Widget Bar Corrupted / Stacked After Login

Hi. I love this widget and I really want to use it. My only issue is that after a user logs in through the widget, it gets stacked under (over?) another widget in my side panel. You can see a screenshot here. The widget looks great and plays nice with the other widgets I have activated before the user logs in. This problem only happens after log in.

In an attempt to fix this I have tried the following:
* Moving the other widgets to another ‘Widget Area’
* Re-Ordering the other widgets

I looked at the CSS file for this widget, but I didn’t change anything because I have no idea what I’m doing! Please help.

https://www.ads-software.com/plugins/tabbed-login/