OK So I think I found my mistake with the Goljan files... but now I have another challenge for you guys =)
I downloaded some medical microbio lectures from the MUSC (med univ of south carolina) website... the problem is the fastforwarding in iTunes doesn't seem to work correctly - for instance, when I listen to the lecture the whole way through, the professor ends his lecture (which I know is correct) with a bit on gram stains. But when I FF to the last part of the lecture in iTunes, the last few minutes are some bit on archae, which the professor describes way back in minute 22 or so. In other words, the fast forwarding seems to somehow cut off the audio prematurely. I know this b/c I listened to it full (without pausing/ff/rewind) one time, then tried again to FF to the end but while iTunes claims this is the end of the audio, it's really only halfway through.
Any help is appreciated. I hate technology...