Duplicate Computers after Upgrading to R2

Hello

Ever since upgrading to R2 I have two entries for every new computer I deploy.  The way I deploy computers is:

1. Start a PXE boot on the new computer and pause it once the MAC address is displayed
2. Go to SCCM console and use the Import Computer Information wizard to enter the computer name and MAC address and add it to my OS Deploy collection.
3. Resume the PXE boot on the new computer.

This procedure used to work fine with SP1 but since R2 I end up with two computers after the task sequence completes, one with a client and one without.  

Does anyone know why this happens and is there a fix for it?