By David Martindale Melissa Joan Hart believes it's bound to happen.Some people might choose to watch Melissa & Joey, her new series with Joey Lawrence, expecting it to be a slice-of-life celebrity reality show."But I can live with that," the former Sabrina the Teenage Witch star says. "They might tune in thinking it's about me and Joey and our personal lives somehow connecting."But once they find out they're wrong, hopefully they'll like what they see instead."Hart and Lawrence, formerly of the hit 1990s sitcom Blossom, have teamed up to do what they know best: a traditional, multicamera sitcom, which premieres at 7 p.m.