So I recently started to move land around in TESfaith but theres a problem, I can't seem to move landmasses from more then one ESP, does anyone know how to do it because I've literally tried everyway I can think of.

There's no general recipe, usually it works better if cells to move belong to a defined region. If not, often it is convenient to create a region and assign cells to it.
Also, be sure to get the http://abot-morrowind.tk/index.php?option=weblinks&catid=53&Itemid=2&-Morrowind-modding-tools that works with script commands too (obviously you have to recompile scripts after moving)
[EDIT]typos

SmartMerger can also move landmasses and update teleport locations and items, however you still would have to do them one plugin at a time.