Level 3 Soviet SPAA is Actually American?

So as you can see in the image below, lvl 3 Soviet SPAA is American made. I don't know if this is because of Lend-Lease or an error on Bytro's part, but I think it should be fixed. Perhaps the ZSU-37/2 could be moved down a level and replaced with the ZSU-57-2 (https://en.wikipedia.org/wiki/ZSU-57-2)?

For those of you who will say "this is a WWII game the ZSU-57-2 is a Cold War era SPAA", I have some news to break to you. The T-54 is already in game and the ZSU-57-2 is based on the T-54.

EDIT: Just realised that the image for the lvl 4 Soviet SPAA is already a ZSU-57-2 but Bytro has labelled it a ZSU-37/2.