I know doordash sometimes orders from the Panda's the next town or two over without telling me until I've finalized the order. I've made a couple apologies to dashers because I tipped what I usually do for the local Panda's and they really deserved more for that drive, since you can't change the tip amount once the order's through. My guess is that for whatever reason the nearer store is unavailable? Too many orders or a glitch in the system or something so they pick a different one. AFAIK I can't pick specific locations.