inconsistent behavior on mac with case changes

I created a dir on my Mac called Rollup, and pushed it out. Then went
to a CentOS box, pulled it, and realized I wanted to call it RollUp
(capital U). I renamed it, and pushed out the change. Went back to the
Mac and did a pull - it said it created the RollUp dir, but it did not
- it was still called Rollup. I reamed it, but status did not pick up
the change. Then I checked out a branch that had Rollup, but it was
gone there - no Rollup or RollUp. I did a merge and then RollUp was
created.

I know the Mac is somewhat inconsistent with how it deals with case, e.g.:

$ ls RollUp $ ls -d Rollup Rollup $ ls -d RollUp RollUp $ find . -name Rollup -print $ find . -name RollUp -print ./RollUp

So I guess I can understand git also being inconsistent there. But what really got me was the dir being gone on the branch.

Is all this expected behavior?

-larry