[racket] Package conflicts for docs with the same names in different collections?

I was looking at the package conflicts listed by pkg-build here:
http://pkg-build.racket-lang.org/conflicts.txt <http://pkg-build.racket-lang.org/conflicts.txt>

I noticed that pkg-build notes conflicts for “main” docs, even though all three of those documentation files are in separate collections. Does Racket require documentation files to have unique names, and if so, why? Otherwise, is it a bug in the conflict checker?

I’m mostly just curious as to why that would be a problem.

Alexis
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