Heard some concerning things about a particular library over the weekend.

I was told a Taxi member had some material in a library (where I also have some songs), that when searched, came up under a different composer's name.
I just did a search for my things on their site, and sure enough ... 1 out of 15 is under another composer. I'm hoping the remaining are linked to me as the writer, even though that info doesn't seem to be visible.
If the song had been placed, I surely wouldn't know about it, correct? If it was, and the other composer got the writer's share, do I have any recourse?
Also, none of these songs appear in my PRO. Do I need to register them, or does the library do that when they're licensed?
Where do I start?
Thanks
