【rails】login.html.erbにアクセスするがshow.html.erbの画面が現れる

###発生している問題
railsの勉強を始めて数週間の初心者です。
ブラウザのURLの場所に

http://localhost:3000/members/login

と直接アドレスを打ち込むと、アクセスされるビューは

app/views/members/login.html.erb

だと思うのですが、違うビューの画面が現れてしまいます。

それに、違うビューの画面が現れたときのURLは

http://localhost:3000/members/login

であり、ページが移動した訳ではないと思っています。

コマンドプロンプト上には、

Start GET "/members/login" for ::1 at 2016-08-18 00:05:07 +0900
Processing by MembersController#show as HTML
Parameters: {"id"=>"login"}
Rendered members/show.html.erb within layouts/application (0.0ms)
Complited 200 OK in 27ms (…

などと表示されています。

ちなみに、上記のURLをブラウザに入力したとき現れる、違うビューの画面はshow.html.erbの画面であり、中身は

これだけです。

以上、よろしくお願い致します。

###該当のソースコード

【login.html.erb】

<h1>ログイン</h1>

<%= form_for(@member, :url => {:action => 'login'}) do |f| %>
<% if @member.errors.any? %>
<div id="error_explanation">
  <h2>エラーがあります。</h2>
  <ul>
    <% @member.errors.full_messages.each do |msg| %>
    <li><%= msg %></li>
    <% end %>
  </ul>
</div>
<% end %>
<div class="field">
  <%= f.label :user, "ユーザ名" %><br />
  <%= f.text_field :user %>
</div>
<div class="field">
  <%= f.label :pass, "パスワード" %><br />
  <%= f.text_field :pass %>
</div>
<div class="actions">
  <%= f.submit :value => "ログイン" %>
</div>
<% end %>

【routes.rb】
Rails.application.routes.draw do
  resources :messages
  resources :members

  get 'members/login'
  post 'members/login'
  get 'members/logout'
  post 'members/logout'
  root :to => 'members#login'

コメントアウト文

end

【members_controller.rb】
# -*- coding: utf-8 -*-
class MembersController < ApplicationController
  # GET /members
  # GET /members.json
  def index
    @members = Member.all
  end

  def logout
    p "check"
    sleep 5
    session[:login] = nil
    redirect_to "/"
    return
  end

  # GET /members/1
  # GET /members/1.json
  def show
  end

  # GET /members/new
  def new
    @member = Member.new
  end

  # GET /members/1/edit
  def edit
  end

  # POST /members
  # POST /members.json
  def create
    @member = Member.new(member_params)

    respond_to do |format|
      if @member.save
        format.html { redirect_to @member, notice: 'Member was successfully created.' }
        format.json { render :show, status: :created, location: @member }
      else
        format.html { render :new }
        format.json { render json: @member.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /members/1
  # PATCH/PUT /members/1.json
  def update
    respond_to do |format|
      if @member.update(member_params)
        format.html { redirect_to @member, notice: 'Member was successfully updated.' }
        format.json { render :show, status: :ok, location: @member }
      else
        format.html { render :edit }
        format.json { render json: @member.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /members/1
  # DELETE /members/1.json
  def destroy
    @member.destroy
    respond_to do |format|
      format.html { redirect_to members_url, notice: 'Member was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  def login
    params.permit! # これは本当はstrong parameterなるものに変えたが良いらしい
    @msg = "get"
    @member = Member.new
    if request.post? then
      @member = Member.new(params[:member])
      record = Member.find_by_user(params[:member][:user])
      if record == nil then
        @msg = "そのようなユーザはいません。"
        @member.errors.add('user', "：ユーザ名が違います。")
      else
        if record.pass != params[:member][:pass] then
          @msg = "パスワードが違います。"
          @member.errors.add('pass', "：パスワードが違います。")
        else
          @msg = "good!"
          @member = record
          session[:login] = record
          redirect_to '/messages'
        end
      end
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_member
      @member = Member.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def member_params
      params.require(:member).permit(:user, :pass, :name, :mail, :memo, :admin)
    end
end

【rake routes の結果】
        Prefix Verb   URI Pattern                  Controller#Action
      messages GET    /messages(.:format)          messages#index
               POST   /messages(.:format)          messages#create
   new_message GET    /messages/new(.:format)      messages#new
  edit_message GET    /messages/:id/edit(.:format) messages#edit
       message GET    /messages/:id(.:format)      messages#show
               PATCH  /messages/:id(.:format)      messages#update
               PUT    /messages/:id(.:format)      messages#update
               DELETE /messages/:id(.:format)      messages#destroy
       members GET    /members(.:format)           members#index
               POST   /members(.:format)           members#create
    new_member GET    /members/new(.:format)       members#new
   edit_member GET    /members/:id/edit(.:format)  members#edit
        member GET    /members/:id(.:format)       members#show
               PATCH  /members/:id(.:format)       members#update
               PUT    /members/:id(.:format)       members#update
               DELETE /members/:id(.:format)       members#destroy
 members_login GET    /members/login(.:format)     members#login
               POST   /members/login(.:format)     members#login
members_logout GET    /members/logout(.:format)    members#logout
               POST   /members/logout(.:format)    members#logout
          root GET    /                            members#login

![rake routesの実行結果](86fcac9db81b25154b581c876193bb23.png)