Yeah, it’s super weird. I once named a file with mixed case, but one of the letters was the wrong case. Renaming the file didn’t work at first. Renaming a file named PAscalCase.txt to PascalCase.txt resulted in no change to the filename. Windows continued to show it as PAscalCase.txt. I had to rename it to something totally different with different characters entirely, then rename it again to get it right.
Nope. Tried that. Tried DIR in a command window too. But I never specified even what version of Windows I was running, so I’m a little unclear why you’re trying to troubleshoot a problem I was experiencing on windows nearly a decade ago. I guess this is what be mansplained too feels like.