Tdee-20% concerns/questions. I want to know it's ok!

Allup2Me78

Ok so my tdee-20% is 1753 (calories allowed per the scooby calculator). That is with my exercise calculated in of 1-3 hrs per week which is about right for me. I have this thing where on non exercise days I feel I shld eat around 1500 (no reason particular) and then the 1753 on exercise only days...Shld I be aiming to eat the 1753 everyday and feel comfy with that since the exercise is already calculated in my allowance? I also get concerned if I have a night say for instance that I go over the 1753 by 500 or so, shld I eat less then the 1753 days after me going over to make up for it or should I just go right back to the 1753 the next day as if I never went over...Please advise ONLY if you are really familiar with the Tdee method..Thanks