Per the US State Department Website. not sure this was the Congressional intent
How will the Department of State process my K-3 visa petition?
Important Notice: Effective February 1st, 2010, when both the I-129F petition for a nonimmigrant K visa and the I-130 petition for an IR-1 (or CR-1) spouse of a U.S. citizen visa have been approved by USCIS and sent to the National Visa Center (NVC), the availability as well as the need for a nonimmigrant K-3 visa ends. If the NVC receives both petitions:
The nonimmigrant K visa will be administratively closed. The application process explained below will not be applicable and cannot be used.
The NVC will contact the petitioner and you with instructions for processing your IR-1 (or CR-1) immigrant visa. For more information on the immigrant visa process review the Immigrant Visa for a Spouse webpage.