Default blogger show blog tittle in front of your blog,(BlogTittle:PostTittle) therefore search engine not track correctly your blog. To change blog title format follow the simple procedure
1. Go to blogger
2. Select Templates and click Proceed
3. Find out the below tag
<title><data:blog.pageTitle/></title>
4. Replace above tag with below
<b:if cond='data:blog.pageType == "index"'>
1. Go to blogger
2. Select Templates and click Proceed
3. Find out the below tag
<title><data:blog.pageTitle/></title>
4. Replace above tag with below
<b:if cond='data:blog.pageType == "index"'>
<title><data:blog.pageTitle/></title>
<title><data:blog.pageName/></title>
<b:else/>
</b:if>
4. Save Template