It's possible that the download of iOS 8.0.2 became corrupted somehow. Have you tried a restart? Press and hold both the power and home buttons until the Apple logo appears, then release both buttons and wait for the iPad to restart.
If this doesn't work, you may have to connect to iTunes and try a fresh instal of iOS 8.0.2.
BTW, I've deleted the other post you made on this same topic. Duplicate posts on the same topic can fragment any resulting discussion, making it hard to follow. It's also against our rules.
I've also moved this post to the iOS 8 Forum where it will receive more attention.