You know, I don't have Wavelab, but it seems to me that there should be some way for you to test whether the channel swapped version had bit literal copies of the original tracks, just with the channels swapped. I can't imagine that your DSP routine that swaps channels would actually do anything but take the left channel samples and put them into the right channel and vice versa. Do you have a short track that you could post both original and channel swapped versions? I'd be happy to take a look to see if there are any differences except for swapping the channels.
I just hate to see tapers spend their time re-doing things if it can be done with less effort in less time another way. We have too much to do as it is. Heck, I probably have 3 dozen shows that are still sitting on the original tapes (and I'm not a heavy taper). I'd hate to think that I had to completely re-do every other show I've ever recorded before I could start working on the shows I've never even transferred, especially if all that was wrong was that the channels were swapped.