Can i straighten warped pine interior doors?

I have hung and painted three pine doors inside my home. I followed the manufacturers instructions to the full but for some reason over the last year they have warped. I can only assume that they must have had moisture in them before sealing with paint and this has made them swell or twist. I need to know if... show more I have hung and painted three pine doors inside my home. I followed the manufacturers instructions to the full but for some reason over the last year they have warped. I can only assume that they must have had moisture in them before sealing with paint and this has made them swell or twist. I need to know if it's worth trying to straighten them agian by taking them down, placing them on a flat surface and placing a heavy load on them for some time. Would this work or will they just go back to the shape they have warped to? Help?!!!
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