RE: Disconnecting the AP and my throttles turn screwy...help!
There is a keyboard command used to choose separate engines. I can't think of what it is right now. Let's assume it's "T" (look up the actual command in FS under Settings >> Assignments >> Keyboard). If you want to choose the left engine, you type "T"+"1" in quick succession. Conversely, if you only want the right engine, you type "T"+"2" in quick succession. If you want to control both again you should type "T"+"1"+"2" in quick succession. The key here is to be somewhat quick about it.
Core 2 Quad Q6600, 9800GTX+, 4GB, Win7 HP 64-bit, TH2GO, 8 GoFlight, CH [Eclipse Yoke, Throttle (Pro and Quad), Combat stick, Pro Pedals], Saitek [Yoke, pedals, X52], TrackIR 3