Help controlling the cursor in swype?
I don't know if a preloaded version of Swype can be updated with a Beta or not, but  beta.swype.com is the starting point for downloading the Swype installer, which will then download the actual Swype keyboard (you must register on beta.swype.com first).

Swype also has user forums, this page lists their Samsung-specific boards.  I took a quick look under the Epic section and didn't see anything applicable, but you may find more on a deeper search.