Adding multiple COUNTIFS issue

I'm trying to build a schedule and I'm running into problems. On rows 37 (and eventually 38 once I nail this formula down) I am attempting to calculate the total number of D shifts and D* shifts based on the duty position in column B. Both D and D* should only count if the duty shift is a AN, AFN, LPN, CIV LPN, or CIV RN. I have what I thought was a solid formula when I only enter D*. This gives me the correct total. However, once I enter just a D, the number adds two more than needed.

Where am I going wrong in formula in row 37? Please teach me to fish.

=SUM(COUNTIFS($B$6:$B$35,"AN",E6:E35,{"D","D*"}))+SUM(COUNTIFS($B$6:$B$35,"AFN",E6:E35,{"D","D*"}))+SUM(COUNTIFS($B$6:$B$35,"LPN",E6:E35,{"D","D*"}))+SUM(COUNTIFS($B$6:$B$35,"CIV LPN",E6:E35,{"D","D*"}))+SUM(COUNTIFS($B$6:$B$35,"CIV RN",E6:E35,{"D","D*"}))

Thanks in advance!