blogger.comへのGTMタグの設置箇所

前提・実現したいこと

blogger.comへGTMのtagを正しく設置したい

発生している問題・エラーメッセージ

ソースを確認したところ反映されていません。　
（以下の2は反映済み。1のみ反映されず）

1、<head> 内上部に設置するtag
2、<body>直後に貼るtag

該当のソースコード

html
1  <head>
2<script async='async' data-ad-client='ca-pub-xxxxxxxxxxxxxx' src='https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js'/>
3    <meta content='width=device-width, initial-scale=1' name='viewport'/>
4    <title><data:view.title.escaped/></title>
5    <b:include data='blog' name='all-head-content'/>
6
7    <b:skin version='1.3.0'><![CDATA[/*! normalize.css v3.0.1 | MIT License | git.io/normalize */html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background:transparent}a:active,a:hover{outline:0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:bold}dfn{font-style:italic}h1{font-size:2em;margin:.67em 0}mark{background:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-0.5em}sub{bottom:-0.25em}img{border:0}svg:not(:root){overflow:hidden}figure{margin:1em 40px}hr{-moz-box-sizing:content-box;box-sizing:content-box;height:0}pre{overflow:auto}code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}button,input,optgroup,select,textarea{color:inherit;font:inherit;margin:0}button{overflow:visible}button,select{text-transform:none}button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}input{line-height:normal}input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0}input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button{height:auto}input[type="search"]{-webkit-appearance:textfield;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;box-sizing:content-box}input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration{-webkit-appearance:none}fieldset{border:1px solid #c0c0c0;margin:0 2px;padding:.35em .625em .75em}legend{border:0;padding:0}textarea{overflow:auto}optgroup{font-weight:bold}table{border-collapse:collapse;border-spacing:0}td,th{padding:0}
8/*
9<!-- Google Tag Manager -->
10<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
11new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
12j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
13'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
14})(window,document,'script','dataLayer','GTM-xxxxx');</script>
15<!-- End Google Tag Manager -->
16