Character mistake: Sam says that "Ginger Fox USED to be good; then she hopped onto the crazy train and ended up on has-been island," (or something of that sort). Freddie then says that "technically, you can't take a train to an island, because they are surrounded by water." This is untrue, because technically, Manhattan is also an island, and there are MANY trains that go to and from this island.
Continuity mistake: When Ginger Fox and her manager are in her room, Ginger squats down to tell her rabbit to roll over. Her bra strap has slipped off her shoulder. When the camera pans out, her bra strap is up. The camera zooms back in to her face, and her bra strap is down again.
Chosen answer: I don't know how to answer the first question but for your second question, there is going to be an episode after iPWV, called IDate Sam & Freddie which will deal with their kiss from iOMG. IParty with Victorious will not be related to IDate Sam & Freddie.
The I date Sam and Freddie proves that they are a couple.