OK, I suspected this also at first, however you said Realtracks worked fine, but Realdrums didn't, which made me disregard this possibility.
It's really weird that RT's would honor a different offset than RD's .. so I'm kind of confused even more by the solution, especially with the bar offset being at -3 .. that's a pretty weird setting and I suspect that however this happened is the real source of the problem.
A bar offset of -3 makes my head hurt!

Thanks for posting how it was solved though smile


Make your sound your own!
.. I do not work here, but the benefits are still awesome