I have no advice. My Disney ablums do the same thing. I have 2 instead of 3 because I added extra pages but I don't care!
All mine always look like that and it usually takes two albums per trip! lol I use strap hinge albums, which seems to help when you add extra pages.
mine looks like that too...I don't dare say how many I have...all our family photos on the walls in our house are from Disney@
Hola! You can extend the metal sticks that hold the pages and add strips of cardboard in between. I do this all the time to mine. It will lay completely flat. Hope this helps!
Oh, my friend! Looks like Beatriz has a good suggestion for you -- glad because I certainly wouldn't have been able to help! LOL!!! I've never did a scrapbook or page yet. From what I can see of your scrapbook though, it looks really nice!