Hi Troy
there is a knowledge base article that you should read about origins - it helps to explain all the different bits (and why moving the page a long way from the original origin is not recommended)
http://kbase.vectorworks.net/questions/1147/Origins+and+Large+Coordinate+Values
Also, if you import ONE file and centre after import, then import the next file, the second file should align properly (don't centre the second file?. when you centre the FIRST file, it moves the user origin. then when you bring in the second file it uses the MOVED origin to line up.
Teri