It sounds like you're near Tom Stinnett RV. They're a Tiffin dealer. Also, if you can't find a nearby Tiffin dealer but do have a nearby dealership that you trust, give Bob Tiffin a call and explain it. He generally approves warranty work to be done at other non-Tiffin dealerships. Okay, so much for that.
1) If the wiper fluid dribbles down it's either a cracked hose near the end where it attaches to the wiper arm, A pinched hose in the wiper arm, or a plugged nozzle. A fine wire might clear that out.
2) Wind noise is tough. It all depends on where it is coming from. The door can be adjusted but it takes a bit of experience to get it right or else it might leak even worse. I'd leave the door frame alone and try moving the striker plate stud in a bit to make it seal tighter though.
3) The residential fridge (I have the Amana) doesn't have an "off" switch. The way to power it down is to go to the AC circuit breaker panel. There's a dedicated breaker just for the fridge. Turn off the breaker and the fridge will be dead. Be sure to crack the doors if in storage though or you'll have mold in there come spring.
4) Your Allison series II panel shows two digits. The left digit shows the gear "selected" while the right digit shows the gear "obtained". Normally you stick it in Drive and it'll show "6" as the gear selected. The gear obtaiuned will gradually increase as you increase your speed and get into those higher gears. When you engage the Jake brake it will try to downshift the transmission to second gear. That's why "2" will appear as soon as the Jake brake kicks in. The digit on the right will still imndicate which gear you are in and will decrease as your speed comes down. Once you hit the throttle the Jake brake kicks out and it will return to "6" again, or whichever gear you have selected as your top gear. The Allison is smart and talks to the Jake brake and engine so it won't let you over-rev the engine. That's why if you manually select a given gear you may not get it if the transmission's ECM decides it's not safe.
For more details on the tranny check out the manuals and topics on TRVN's RV Tech Library
. There's lots of other good stuff in there too that'll help you out with your first class A.