No dude i noticed at the gaara recharge u can level up they added 1 thing , and obviously the person bought a lot of stamina + had a medal . Lvl 35 in 1 day isnt impossible u can get lvl 80 as long as u got the money to buy stamina :) . Thats not a bug.

Oh i didnt know that but lvl 35 in 1 day is possible with the new missions i guess .