I just recently noticed that after entering large numbers of marriages, building the framework for the vital records of my ancestral hometown, and entering the ones connected to my lines onto FamilySearch:
1.) I find that the bride's parents, or the groom's parents, are already on my lines and already connected. If the bride happens to be the one, I enter her first, because she is connected to her parents. Then I enter the groom. Then I enter his parents. That way, nobody is disconnected. I do all this after putting the marriage into RootsMagic 7.
2.) The names of the groom and bride, and the approximate birth dates, transfer when I add those persons to FamilySearch, but the marriage did not. That is a lot of marriage dates that could have been showing in FamilySearch, especially since the source is the marriage record.