Replying to 540s vs 180s

  ok, so i hurt my shoulder this week at the hill and i was taking it easy, sliding rails and what not, practicing style
i decided to do a 180 or like a 15 foot air, nothting big
at that point i realize i am alot more comfetable at floating a 540 more then i am doing a 180
now i can do pretty decit 540s, not hucked, float them nice, and working on differnt grabs tweaking out mutes and what not
but for some reason its harder for me to do a 180 then it is a 540
wonder if any one else had this problem