I finally had a chance to take some screenshots.
I am running version 5.2.1 and I did not have "Use Cal Offset (DO NOT USE)" checked before, but I do now, and it still displays this way.
Here you can see it shows the birthday listed Today and Wed Apr 30 even though it only occurs on Wed Apr 30:
This is the details of the actual event. Again, you can see it's only set for Wed Apr 30:
Doesn't show up on Tue Apr 29's details:
Does show up on Wed Apr 30's details: