What's going on here?

[FightingBuckeye]

I had the Union Paducah militia unit kicked out by CSA forces. It survived and made its way to Cairo where Halleck recently turned it into a real unit. I go to add it to a division that has plenty of space for it (currently sitting at 13/18 elements) and the option to combine the units goes away. I can add another former militia unit to the same division just fine. Anyone know what might be preventing that unit from joining the division?

I might just send it out to garrison duty somewhere, but I kind of needed that division up to full strength for what I'm planning.

[Captain_Orso]

That's definitely not WAD.

Could post the Save?