Error with Gunstar Super Heroes

Hi everyone. I uploaded a bunch of manual scans today, but I realize there is a viewing error for Gunstar Super Heroes for the GBA. I believe this is because I selected grayscale when scanning the B&W pages. I rescanned the pages, but I get an error when I try to upload the new version.

Also, I have at least 7 more manuals scanned that I am unable to upload, because the server connection keeps getting lost. It seems that I am unable to upload any files > 40 mb without the connection timing out.