My guess is you are probably using a clip mask, or something else that has not "completely" changed an object, but is only showing a final output of what the toll is doing to the object.  In the case of a clip mask, it is cutting out part of the larger image, but the image is still there - it only shows you the part that is cliped to fit your clip mask.  If you seperate the mask from the object, the image returns to the full size image you started with.

What Corel is wanting to do is lose that "dynamic" mask, and make an actual object the size that is shown - so it can be handeld properly in Photoshop.  This is usually resolved by rightclicking and selecting "Combine Clip Mask".

I don't know what dynamic objects you have, but most of these can be seen in the Objects viewer as the thumbnail with a little "+" sign, and a vignette of what ever the dynamic object is doing.  These objects all should be treated individually to make a final output of whatever the dynamic action is doing to constrain them (as you see them).

I hope that makes sense.