Not just band hero, and as Magnet pointed out not just with vocals, and sometimes different lengths(see livin on a prayer).
There are dozens of cases where hmx got one version and gh got another. Some are intentional and some are accidental. Hell there was a case where hmx was sent an unreleased version of a song instead of the single version completely on accident(was it panic at the disco?). It happens.
And it doesn't always work, but in some cases you can move/cover the mic where those od spots are.
And as for the who gives a flying **** comment, I know people obviously do care about censorship(I certainly do but I understand it is what it is; no amount of *****ing is gonna change it), but it was directed towards who cares whose fault it is. What's done is done, intentional or accidental, label's fault or hmx's. This version is what we got, remember that.
And next time you want to go around acting like a know it all, maybe you should check your facts before telling others to do so.