Yeah, the timeline in the uma musume verse is fucked (or the girls just grow really fucking fast)
The Uma-verse (as I'd like to call it) has the same time progression as The Simpsons or Sazae-san, which means they stop growing at a certain point and the established status quo will last until the end of eternity.
Just which year are you in...?For lunch, I'm having a "Kitasan", a "Cut-up Sand"-wich! Eh? But I didn't cut it?Loli Teio who admires Symboli RudolfHuh?PCPresident Rudolf...Loli Kitasan who admires Tokai Teio