[.802] company creation issue

I created two companies of troops (10 units in each company) grouped them with some champions and fought a bone ogre.  After the fight my companies had 5 troops each.  When I went to make another company the company size was reduced to 5 troops, so making a party of 6 at that point was better. 

Should there be a way to resupply a group of troops to get it back to its original size?

I saved the game at that point but am not sure where I would send it to.