Y'know what, I'VE READ YOUR EXPLANATION COUNTLESS TIMES. IT DOES NOT MAKE SENSE BECAUSE IT IS UTTERLY GROUNDLESS. It is based on misrepresenting quotes, twisting scanty evidence to say things it absolutely doesn't, and your own personal wishes. Let me put this another way, bluntly and in all caps so as to make sure my meaning is clear. YOUR EXPLANATION PISSES ALL OVER THE AVAILABLE EVIDENCE. THIS MEANS IT IS NOT A GOOD EXPLANATION.

I already said it depends on one's perpective.
The reasult is you misunderstand My explanation.

And you know what? F*** you and your "Maybe you should read it again" ****.
Ryusikaze, please dont make a personal attact like that.Take it easy.

And Time is Finite. Head backwards enough and you hit the start of time. All Ulti has to do is compress backwards, and ignore forwards, which is redundant to her goals in the first place.
If time is finite you cant go to the past.

Ultimecia uses the term 'Time Compression' and 'Compressiong Time' to describe it herself.
Ultimecia uses TC term because She thinks she can compress time but She was wrong that's why She absorb Time

"A sorceress trying to change the world by compressing time and taking power from all sorceresses."

That scan info tells us Ultimecia is TRYING to compress time.She only T-R-Y-I-N-G,trying.Then she realized She cant to compress time because time is infinite, that's why in that Final Battle She transformed to absorb Time.