OK, I made a different configuration for the collage and uploaded it in the tall collage's place. Hopefully this works better for people. You'll probably still need to open it in a new window/tab though!
Thanks everyone!
Don't forget if you click the image and then right click the popup and select Open in New Window (or Tab), it will open a higher resolution image that can be zoomed a bit. That being said, the gallery still shrunk my image an annoying amount.