I'm definitely not a professional or psychiatrist but there seems to be an underlying problem here. your mum went O/S and when she came home, she had nothing to do, got in the way and was a 5th wheel. Maybe to feel more like a mum she decided to clean and it got too much. Another possibility is she stirred up memories O/S and started to look for something, starting in the study and working through the house trying to find it, without putting things back. It would explain the don't touch anything (until I find ?).
Hoarders usually build up over years, not suddenly pull everything out and just leave it. It sounds like the house was clean and everything throughout the house has a place to go, it just needs to be put back.
Either way, it sounds like she has found what she was looking for or at least got over whatever problem she has (at least partially). Organise dinners at neat freaks houses, get behind her and help with the cleaning (she goes through the boxes and you put it away) but most of all love her and encourage her and talk to her because she is your mum and will always be your mum.
If all else fails try what Sheldon from Big Bang Theory did with Penny and throw her a chocolate when she does something good, positive reinforcement.LOL
Hoarders usually build up over years, not suddenly pull everything out and just leave it. It sounds like the house was clean and everything throughout the house has a place to go, it just needs to be put back.
Either way, it sounds like she has found what she was looking for or at least got over whatever problem she has (at least partially). Organise dinners at neat freaks houses, get behind her and help with the cleaning (she goes through the boxes and you put it away) but most of all love her and encourage her and talk to her because she is your mum and will always be your mum.
If all else fails try what Sheldon from Big Bang Theory did with Penny and throw her a chocolate when she does something good, positive reinforcement.LOL