Yours is way beyond 256 lines!!!!
How did you get over 256 lines codes??? Do you checked all the checkbox to enable or some?? If you don't know where to check your current limit codes line, check at the bottom right corner of codemanager.
When I save txt file that is over 256 lines, it worked but when you export as gct file, it wouldn't allow it. Your codes is brawlminus set which is the large st for codes. I thought you say you use beyondyous but now im confused.
If you checked all the codes, then im really curious how you did it, step by step doing
Your WAY