I guess you are looking at a cached entry. The date is Dec 26, 2015. I just did a query on your site and google was showing it normally without any date appended. You might have seen this date stamp because your blog was too new at that time.
Google bots cover several trips before it could understand the hierarchy of your blog pages.
Improve Blog SEO:
Always noindex your archives and search pages. They are considered as duplicate content and often invite Google Panda. Instead of using the conditional tags (you mentioned) for enclosing your title tag, use the following which we use on MBT and all client sites:
<b:if cond='data:blog.pageType == "index"'>
<b:if cond='data:blog.pageType != "error_page"'>
404 | <data:blog.title/>
Appending your site title after every page is not a bad practice but I am personally not in favor of it.
You have already noindex archives but also do it for search label pages.
For noindexing search pages but allowing links to followed add the following code just below the closing title tag:
<b:if cond='data:blog.pageType == "index" and data:blog.url != data:blog.homepageUrl'>
<meta content='noindex,follow' name='robots'/>
Hope this helps buddy =)
@syncboost I also read your feedburner post. Really appreciate your efforts. This idea is great and I would request you to kindly share full details always on forum and do not encourage readers to read it at your blog because this habit could motivate other forum members to start doing the same and ultimately spamming the forum. Hope you understand.