Weird. I have the same problem GrossmeisterM observed: though I can vassalize Albania, I do NOT get drawn into the Ottoman war. I was assuming a bug crept in somewhere, but not sure now, if only some of us experience this anomaly.I just tried it and it works, just make sure you spend all of your money first (build units and/or don't ask for money from Albania). Otherwise the Ottomans will still take peace but you will have to give them all of your money instead of a simple defeat.
This is with 1.3.2 (D2AO)