When synchronizing a new subtitle to one of my movies i wanted to sync it by using a different subtitle that i ripped from the dvd itself so it would have perfect timing, but when i did that it doesn't copy the times correctly? what can i do? the time is off on most of the lines by 1-2-3 seconds - which is alot... and i checked that there are the same number of lines so i really can't tell what's the problem...