Ok so i was noticing in every park i skated that the time on the replays was screwed up like the training facility in skate 2,except eflixxx's Monterey park,he told me that his terrain and props meters were full and thats why it gave you a normal replay time in that park.
So i tested it out on the Psychonaut TC and sure enough it fixed the glitch and you now get a normal amount of replay time and this can actually be set by how close to full you have your park.At one point i had the TC down to a 25 second replay meter,then i deleted a few things and brought it up to a healthy but not glitched 41 seconds available.
So there it is,fix your parks by filling the meter's all the way up and enjoy normal replay editing abilities.