Replying to Final Cut exporting help

before i tell you whats happening I just want to say this is the first time this has happened to me and I don't know what the fuck is wrong. When I'm done exporting and i go to watch the video, in quicktime, at about halfway through, it appears that final cut during exporting took the clips and reset were i cut them at, so, it skips the trick and just goes to the landing sometimes, or it just shows the run in i have no fucking idea whats wrong and i need help
+K to anyone that can help