Hi.
A number of issues have been raised in JIRA over the last while regarding the Build History Widget and how the layout can go a bit "screwy" as more data gets cluttered in it.
Here's a few of the JIRAs. The main problem stems from the fact that Jenkins tries to cram too much info into 1 narrow row in the build history widget. It get's especially bad when long build names or descriptions are used. Lots of badges can also cause things to look funny.
The PR has details of the changes I made so no point in repeating that info here. PLEASE get this code if you can and give it a try, letting us know if it fixes things for you and (especially) if it introduces new quirks.
Regards,
Tom.