Somebody correct me if i`m wrong but once your project id  enters the pool mining i don't know you can get out that easily.
For example i had a situation where clean windows install with new wallet new gridcoin.conf  (poolmining was not enabled)
but same projects(id) that were in poolmining before , resulted in me still been part of the pool.
So enter  listcpuminers  command in debug console,find  your address and see if it mentions pool somewhere.