Switched at Birth/WMG

The series was planned to have a LA-area setting and it was moved to Kansas City sometime after The Pilot was shot.
The cars in The Pilot have CA plates genericized with "Drive Safely" in the same font as the "California" that would normally be there, Carlton's campus is more open-air than one would find in even the Lower Midwest, and the Kennishes' lifestyle suggests a large chain of car washes.

Melody will become a Shipper on Deck to Daphne and Emmett if/when she finds out about Daphne's interest in him.
Jossed.

Emmett's arrest will be not only for painting Bay's art on the billboard, but all the graffiti Bay's been doing.

 * So far that hasn't been brought up but the $5000 fine does seem more than a little bit high for one tagging of an empty billboard. They must at least suspect he's the source of it.
 * But remember how in the first episode, Ty says that the penalty for graffiti is a ten thousand dollar fine and thirty days in jail? Presumably, Emmett got of light. Which brings up certain Unfortunate Implications...
 * They do have a case that the police escalated to excessive force that would've been unnecessary had they not failed to identify themselves in a way a deaf person could comprehend (which would've been a simple matter of switching on the red/blue roof lights).
 * There's also the matter that the city straddles a state line with possibly very different penalties depending on whether they were able to connect him with graffiti in Missouri, Kansas or both.

Daphne, Bay and/or Regina will lay a verbal smackdown on Travis' folks for not even bothering to learn to comminucate with their son in the future.
Tell me I'm not the only one that wants to see this happen.

But seriously, Regina and Bay both went to great lengths to learn sign language to comminicate with a deaf loved one, and if the last episode of Season 1 is of any indication (not to mention that this is an ABC Family show), there does seem to be a bit of a Love Triangle brewing between Travis, Daphne and Wilke. Daphne certainly seems to have taken some interest in Travis. Only time will tell though...

Bay is not connected to either family but is actually Ally's long lost sister that both sisters don't know.
The real Kennish child is Ally Dawson, but was switched before the actual birth switch. But this family then moved to Miami, and neither sister knew who was the real one.