I'm having a similar issue with my kitten, Muscat.  He has a very vigourus
stroke when he does his biz.  He also shovels litter out of the box when he
gets the 'zoomies'... I'm gonna go buy covered litterboxes for the
furballs... As I end up vacuming every time I scoop their boxes.

Mabey a covered box will help you as well?

Mathew
Butler to 2 kittens: Chablis & Muscat
En Vino Veritas

Get a taller box.

**Hi Ice,

Try buying a (cheap) tablemat /cover. You can buy them anywhere. I got mine
at the Dollar store. Cut it with scissors to the size you need. I simply cut
mine in half. Then put under the cat box.

It doesn't exactly solve the problem, but it definitely* makes the 'clean
up' issue easier (plus if any poop get knocked out by his digging, at least
it won't land on my carpet any more!). My good friend had suggested this
great tip to me, after hearing me vent on and on about my frustration about
it.

My young, almost 6 month old kitten, Dove, usually makes a big mess with his
litter, kicking it waaay over the floor surrounding his box, so this plastic
cover underneath has really been a big help.

ML

I seriously doubt if Chloe knows what she is doing is "wrong" (at least, not
in the way that we hoomins use that concept).  Nevertheless, a possible
solution is to use a much deeper litter box.  I first used the "large-size"
standard-type litter box for Duffy, but he would sometimes back up and let
his back end hang over the side.  So, I bought an extra-large covered box
(with hood) because the sides are much higher on those, then I discarded the
hood.  That worked like a charm, and I have not had any problems since.  You
might want to try that.  Incidentally, you mentioned some physical
disabilities, so I think this would be easier for you than the oversized
plastic "bins."  When I want to completely change litter, I simply pull a
large trash bag around one end of the box, tip it up on end, and dump the
contents into the trash bag.  Then I clean the litter box and refill it.

MaryL

You can get a tray that has a shield around it. She might just be over
enthusiastic when it comes to digging. Chase likes his litter very
deep, but without the shield, he shoots the litter right out of the
box.

I would have at least a couple inches of litter. If you use scoppable,
then deeper helps prevent the litter clumps from sticking to the
bottom of teh box. Some cats prefer shallow and some prefer deep, so
part of it is trial and error.

You can buy litter trays with higher sides. The one I  have has a
clip- on extra bit. I would also take her to the vet ; a change in
behaviour warrants a check-up.
Alison:)