Jay, that is simply false. Guard and reserve guys sign DD-214's every time they are released from active status. This is a fact, I've done it as a Guardsmanand I'm looking at my last one as I type this.
You get a DD214 every time you are released from Active DUTY, not Active Status. Here is the proof:
http://arpc.afrc.af.mil/separations/dischargecertificate.htm
I was incorrect about one minor detail...guard and reserve only get a DD214 when released from 90 days of Active Duty, not 30.
When you are discharged from the guard completely,it is another form. I'm not crazy on this. I've got two DD214s from when I completed my Active Duty times of more than 90 days and I got a third, DIFFERENT form when I was discharged from the Guard completely, but it was NOT a DD214.
The website I listed explains that I am correct.