I could kiss your feet! Fantastic, thanks so much, you might just have saved me junking some records at the very last second!
Yes, I too have had this issue - like today! I bought recently about 30 Pathe discs and I'm slowly going through them all. The bigger diameter discs play fine but I've acquired a number of 8 inch (?) discs which have exactly this problem. they track on one side only, the other simply sends the soundbox sliding toward the centre spindle (sometimes at great speed). But why? I don't know. I never encountered this before.
I thought it was simply a tracking error on the machine and played them on a different machine but whilst there is a little improvement on SOME records, most do exactly the same with a different s/box, tone-arm etc.
I'm totally baffled.
I was about to sling these non players but your post has given me reason to think twice. They can't all be ruined can they? What are we missing here Sherlock? There's something we need to do to get them to play.
Let's put our collective heads together!
You can put your socks back on now!
Steve