Danube Front OOB error?

[Kingfish]

Just picked up this game and while scrolling thru the units for the grand campaign I noticed what seems to be an oddity.

The Russian 39th Guards Motor Rifle has a T-80 assigned as the tank battalion for the 117th MRR. While itself not a big deal - a few other MRR have T64s - this lone T-80 shows it is equipped with TIS. It appears this one unit is the only one so equipped. Even the T-80s in the 3rd Shock and 1st Guards Tank divisions are not as fortunate.

Is this an error or by design?