The Mod-Podge Experiment

 I got this a while ago and wanted to try it out - I pulled out a set of 3 prints I got on sale a long time ago and cut off the first one. I covered a canvas with a layer of mod-podge and let it get tacky dry before putting the picture on the canvas.

 I then covered the whole canvas and picture with mod-podge and let dry.

The paper pulled up on the edges as it started to dry. I pushed them down with my fingers and then walked away before I played too much.
It dried all warped and wrinkled. You can see the beginning of it in the picture above. While I like the texture the mod-podge gave the picture, I have to figure out a way for it not to warp and to lie flat.
Anyone had any experience with this?