litter tray problem

Both my buns were litter trained and thankfuly only peeing in the litter tray.

But all of a sudden they have started peeing in the opposite corner of the hutch.

I have tried moving the wet straw, megazorb and paper. Even srubbing it to get rid of the scent to no avial.

I purchased another litter tray so there is on in each corner, but pandora and leo seem to be pushing it out of the way and peeing in the space they can pee there.

Anyone got any idea's would leo's truama have caused this or is it just one of them things?

I have already posted this but had no replies, surley someone out their has had this problem or has a tip??

Hi, can't offer any clue as to why they have selected another spot to use as there toilet...sorry.
Perhaps securing the new litter tray so that they can't shove it out of the way might do the trick.... Good luck