I have been able to reproduce the problem you are experiencing and have notified the developers of this issue. I will update this post when a future release addressing this bug is available. Thanks for alerting us of this bug and helping make Skuid better!
The popup input field descriptions is an interesting idea, we will consider it for a future release. Vote this up if you would like to see this so the devs know how important this is as they consider ideas for a future release.