Anyway I think the problem is that ALL TRACKS ENDS 2 SECONDS EARLIER, that's the problem, and 1 and 11 are the tracks on which it is more EVIDENT since it ends fastly, tracks with fade outs do not show the problem clearly, but THERE ARE 2 SECONDS MISSING, that's the problem, a guy put 2 seconds mute programmed before each songs and these 2 seconds was taking off the preceeding track