So you are getting the DW recordset function code duplicated with each recordset that you add to the page? I have not seen this issue before myself. Are you getting an error when you load the page after adding a second recordset?
I would hate to suggest to reinstall DW but this seems to be an odd issue. Has it always done this since you installed? If so re-installing might not solve the problem. I think you should look around in the Adobe forums to see if any others are experiencing this and what they have done to resolve it, I'm not familiar with the issue.