Google Penalty - 2 feedburner feed

[articles2u]

My blog articles2u.com have 2 feedburner feed. One feed created on google account, another feed created on feedburner account. I think this is reason for google penalty. Now i delete one feed and change settings of another feedburner feed, i active noindex options on feedburner publicize tab.

Till last month Google cache my blog home page within a minute....(after blog post). But now my blog home page cache not updating very fast. (after activating noindex options).

Please help me to solve problem.....