So every patch there are two CC ranking seasons.
But why?
They don't offer any gameplay changes, new rewards (the framing kits don't count) and there is no PVP series to grind alongside. So like, what is the point of making two seasons instead of one, one with every PVP series? Especially since at that point most people aren't interested and as a result matches take forever to find and you play against the same players.