Ok, first of all:
I don't think you're just making up the times. I think you're using action replay instead.
Use of Action Replay codes is against the rules. Your scores and times are telltale signs that you are using them, because the only ones in which you are excelling are levels that have shortages on rush fuel.
NC Boss, for Sonic and Blaze, can't go under 24.5x seconds. Sonic runs at full speed to get 24.5x, and misses no opportunities for a hit, including turtle springs. The only ways to gain extra opportunities are to have moonjumping functions or speed-gaining functions during the bossfight.
In Dead Line 1 Blaze, you're doing something to pump rings or get around the stage better, because only 519 rings exist on the course. Assuming your score has a prefect speed bonus, you'd have to had picked up 487 of them. The only way to get over a certain amount is to backtrack through the stage. And by doing that you would have had to forfeit your Time bonus, because the bonus starts dropping after 2:30:00.
So you're either lying about using cheats or you didn't read the rules. Either way you don't belong on the charts.