michael adams wrote:

Bottom bracket axles can't shorten. What's hapened presumably is that
the bottom bracket cartridge has rotated on the threads inside the
shell and moved across.

If the above is total nonsense, then presumably it will be corrected
in short order.

It is nonsense. The crank side is the fixed cup and is tightened up
completely. Undoing this will move the crank out, not in.


...d