i'm noticing an issue that after importing numerous video clips (ie: 5 clips) and after exiting imovie 08 and later opening the same project... the last import clip is only shown (ie: only the last clip of 5 clip is shown)!?

i've checked the HD and noticed that all the clips are shown in the events folder, but when opening imovie, only the last clip is shown. anyone's assistance is appreciated!