[SickAttack]

The problem is that you're not adding up the amount of the chosen option and the initial last offset of the previous category(ies). For example:

pawn Код:

Player[playerid][CarChoice] = listitem + MAX_SPORT_VEHICLES;

pawn Код:

Player[playerid][CarChoice] = listitem + MAX_SPORT_VEHICLES + MAX_SALOON_VEHICLES;

Same goes for any other related-options/features.