My main pet beat Mauve and in spending my experience points I could not see any change so I hit the spend button a couple more times and now have negative points -7450. How do I correct this, can not minus current points?

File a ticket

Just keep battling and it will get back to where it needs to be. Just think of it as a loan - you got more stat than exp you had so you owe it back.

It happens all the time - filing a ticket is the ultimate answer, but the response I was given when it happened to me was it takes a programmer to investigate and given the amount I went negative - battling my way out was a quicker solution

That was what I hoped but not being sure I did file a ticket. They will probably tell me the same thing. Glad I still have all the Sylph challengers to do.