Updating Album Information

I ripped a CD that I had burned that had two different CDs from two different
artists on it. When I select "Find Album Info", it brings up a box asking me
to input an artist/album/Put info in manually. Other times I've tried to do
this, on tracks already on my computer, it brings up only the tracks that I
have highlighted when I select "Find Album Info", and it already suggests an
album once it loads.

For some reason, this new format attempts to update all of the files that I
had ripped from the CD, as opposed to just the files I have selected. I've
tried separating the files by manually changing the info for the files to
their own CD name, but it's still updating all of them. It seems like it's
"grouped" these files somehow. How do I fix this?