1) Cats do not re-partner to each other without the owner using the re-partner button, so I would say it was a user error instead of one time being clicked re-partner was.
2) As stated above there is the FREE break free bottle that can be used on any partnership now. (not sure what part of free you missed)
(and if you burned through all your money buying vitamins that did not work you might should read what each one does, you can find that info in the manual or on the front of the vitamin bottle)
I would advise you perhaps take a peek at the online manual for much of your kittycats questions/concerns. The Manual really does outline things in black n white for the most part and answers questions users have very easily with a little reading.
KittyCats! Manual