Opening multiple files from batch/command-line

Hello. I'm trying to write a batch file that will open multiple files into Mp3Tag, but only the last file ever gets loaded.

Example:
"C:\Program Files\Mp3tag\Mp3tag.exe" "C:\a.mp3" "C:\b.mp3"

Only "b.mp3" is loaded when Mp3Tag starts.

I noticed that if I DRAG files onto Mp3Tag.exe they all load. So I wrote a small program that prints whatever command-line arguments it is started with to a text file, and the arguments are identical whether I use a batch file, or drag onto the .exe...?

I've tried everything I can think of. If you don't know the answer, I'd appreciate anything you know about why arguments would be treated different based on command-line vs drag-drop.

--Will

"C:\Program Files\Mp3tag\Mp3tag.exe" "C:\a.mp3"

"C:\Program Files\Mp3tag\Mp3tag.exe" "C:\b.mp3"
...

should be working.

Thank you.