The Komintern & the Chervona Ukrayina are both modified WW1 pretty basic Light Cruisers, with only 5.1" guns (although a lot of them) The base model for the Light Cruiser of this model number is HMS Emerald, which is actually a bit smaller and has fewer guns, although of 6" calibre. I don't think they are really wrongly classified - the stats between the 2 classes aren't that hugely different, to be honest. Possibly more of an issue might be the cruiser "class names" for the Soviets, and indeed possibly the actual cruiser names as well (remember that the Game will not use a name that is already assigned to a ship that exists in the files, even if it is shown as Dormant (eg awaiting construction via event).
Tim