Doesn't sound like your specs are rubbish then! Ive just been having a nosey on Pinnacles support forum, and from what I have read there-Some times rendering the clips as AVI's before editing works....So maybe worth a try with just a couple of clips. Ive also seen something about "Sync lock" But not knowing the program I'm afraid I cant give you advice on that (Although your instruction manual will most likely be able to).