I have an Epson 9880 and have some profiles I made for it for various papers. It's usually fairly accurate with its colors, but today I made a 48x32 print and the colors were very different from an identical, smaller 8x12 print I made both earlier and later. The image is the same image. The color profiles are the same, same paper, same printer, same file (just resized), done through the same computer using all of the same settings and software.

I printed the smaller file first to test it and liked what saw, so I blew it up and reprinted it and the turquoise sky came out magenta, the blacks came out darker, and yellows more intense. Then I took that enlarged file and shrank it back down, and got the colors I liked again, without making any other changes other than the size. Has anyone else experienced this issue, or have any ideas as to what could be causing it? I'm stumped.