I hope your mom is doing well and is just extra crabby today
Did they at least give her the BIG bag that really isn't a bag at all but a big plastic container with a bag attached to the bottom of it? Those tiny leg bags hold way too little. They were kind enough to send my wife home with both.
she has both, but won't slow down, so she wants to use the leg bag during day and large on at night. And can't remember how to switch them. (And take my word for it, it is NOT rocket science)