I'm just curious whether you mean Zwiedorf south of Altenhagen in Kreis Demmin or some other location. I don't find Zweidorf in the Gemeidelexikon fuer das Koenigreich Preussen (1908) in Kreis Demmin. Neither do I find a Zwiedorf which means that you might find some of your ancestors in the Mecklenburg census material on Ancestry (1819 census, etc.).
My own Jahnke ancestors moved around a bit. I've only found a single Erdmann Jahnke in the 1799 census for Swedish Pomerania and he was closer to Wolgast than Ziethen at that time. However, the 1799 census omits so many parts of Swedish Pomerania that they could have been in Ziethen still since my ancestor, Maria Sabina Jahnke, was born in Ziethen in 1792. Sadly the kirchenbuecher for Ziethen prior to 1818 were lost in a parish fire in the 1880s. Even conducting an area survey only turned up the marriage of her parents in Zuessow. Day laborers weren't in servitude in Pommern like they were in Mecklenburg and they seem to have traveled around.