Order of vehicles

I notice that some vehicles that can be investigated are poorly set out in the order in which they are investigated in the game.

Examples of this are the Japanese TKK which is after the Type 10 which should be the other way around as one is the prototype version while the other is the mass production version
TKK>>>Type 10


Another example is the F16A and the F16ADF, one being the air superiority variant and the other the ground attack variant.

these are just a few examples I’m sure there are more but just note these two.