...is the 9nth:
http://www.companyofheroes.com/blog/2016/03/04/the-vetreinforce-bug
"...a complete fix for the Vet/Reinforce Bug is currently tenatively scheduled to be released on Wednesday, March 9th."
Also:
"It was discovered that the cause of all the bugs to do with the reinforcing vet squads is due to limitations with CoH2’s game engine and therefore the engine itself would need to be updated before a proper fix could be rolled out. This was a very important piece of information as it meant
the Vet/Reinforce Bug has been in the game since launch."
I don't know enough about the engine, but is it possible that CoH1 and maybe DoW2 have a similar issue?