May be a glitch, I've been watching my sister play on the new update. She's a level 20 too and after her first few matches she's still level 20.

Only thing I could think of since the systems are similar.

I only participated in the first one (I was away during the second), and I didn't seem to have any problems then.

Have you had a Splatfest issue in either of the two Splatfests?

I think you got points from the matches you played when you were the max level

I played a turf war and instantly jumped up 4 levels. Was... that supposed to happen? Or did the game just glitch in my favor?

My level just jumped from 20 to 24 instantly?!