Robin is right, that message is a couple years old. It went up when we, the Leaders (then Supervisors) were in a constant battle with new duplicates of profiles coming in with every gedcom upload. The duplicates were getting out of control, so there was an initiative to get all those merged into one, final profile-the same goal we have now, but with the gedcoms being of far better quality because our procedure has changed, it isn't as necessary. The usual path of requesting a merge works just fine. You can actually delete that message, if you would like.
That message was simply there to let profile managers know a Leader was going through all the merges at a rapid pace because there were so many (at the time) or the family lines were messy. I don't think it made things any more difficult, but it did bypass the usual system at the time. It is less common now, though does happen in very popular family lines, like those of the Mayflower families, or in the European Aristocracy Project. It doesn't affect your ability to do anything with the profile. Just talking about merging.