The girl in IT, well. Suggestion one: run DBScan to determine the state of the PIM file (
http://pimlicosoftware.com/dbscan.zip). After ensuring the file is in good shape (you may have to read the doc's and it is discussed here on the board), then set the conduits to "device overwrites desktop" for the majority of items being sync'd. In fact, my conduit has none where "desktop overwrites device" is the default action.
If you had the desktop from the 650 installed and the PIMs working there, then uninstalling the 650 desktop (leaving the data), installing the 700p desktop would have left you in a position of everything there.
Ben