Halfbacks and fullbacks

Halfbacks and fullbacks. ATG.

Not that big of a deal, I guess, but going through my re-opening night play by play, several times it seems HAL put fullbacks in as half backs and half backs in as fullbacks.
I guess that's not the end of the world, as real teams will sometimes run a backfield with two halfbacks or two fullbacks, or a fullback running behind a half back. But, something tells me this is not HAL but it's a programming bug?

It is a good question, it might depend on All Time Greats vs. 2016. With the ATG set HBs and FBs are more interchangeable with the SOM CD-ROM Football Game. In the 60s, 70s and 80s teams used two running back formations, almost exclusively on 1st down.