Petja
the magic of very detailed description!
Looks like user error to me.
You haven't removed the first patch (Tip 1 to Ganged w/d 1 &2)! By patching Ring 1 to w/d 2 alone you haven't actually killed the first patching (gang). Removing a patch requires to highlight the very same parameters and enter the patching area AND null the previously programmed patch.
So you haven't changed a patch (gang) to another (single), but simply overlapped them!
arf!
I
