I don't know, I hate to CAST or CONVERT data when it is not needed.
You could test this if you create a temporary database with the same table and then try to import data and delete import fields one by one to see what cause troubles. Of course this is a time-eating procedure, but after that this package will run a little faster :-)
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.
