Hi, thanks for your reply.
The weird thing is, no, I haven’t done anything to the original, sourced audio files but move them to a different hard drive. How that changed the data is beyond me.
There is a timecode associated with the clips, which is how I worked out the media start and end points had changed and not the in and out points I’d set.
I am going to use the slip tool to manually re-sync the audio, as you suggested, as it can’t be any more tedious than the syncing I’ve had to do in the first place to find the right audio files (it was not me who logged the original files, many people have come and gone on this project and the classification of all the files is all over the place.) The media limit message was only when I tried to extend clips already in the timeline (and hence they butt up against other clips). Using the slip tool keeps the duration the same thereby avoiding this problem! I haven’t used it before so wasn’t aware it did that.
Thanks again!