photoshop cs4 says it's already installed on two machines

I have Photoshop CS4 installed on two computers. I've been using it on the 1st computer for several weeks. However, today, I opened it on my 2nd computer for the first time, and it says I've already got it installed on two other computers, and have 30 days to de-activate it on one of the other computers. But I only have it installed on two computers PERIOD. Anyone know about this? How to fix? thanks!

you need to call customer service so they can reset your activation count. probably won't be in tomorrow, i'd guess...

might still be there tonight though... i think they're closed at 5pm PST...

Thanks