This happened to me during a Push Hideout-Security match. I called in smoke artillery, my observer radioed it in. After the observer radioed it in, I switched to the attack helicopter call-in, and Overwatch confirmed the attack helicopter instead of the smoke artillery. Smoke artillery ended up coming down first with the attack helicopter coming in a few seconds after. Recap isn't showing up for the match, otherwise I'd link it.
Bug allowing double Fire-Support call-ins