Wanted to do some painting last night. squeezed out a little white for base coat, added a little high performance reducer...shook it. Instead of consistency of whole milk, I have curdled milk. What is happening? Could I have mixed up the reducer and cleaner (I buy them in big bottles and put them in little bottles for use)?

How long has the paint been sitting?

Not sure. It poured out of the bottle just fine. I actually cleaned it all up, used a different method for reducing, and it sprayed just fine.