Dupes Teleported themselves to asteroid without teleporters

I sent one dupe and a rover to start a new base on Glowera. I landed the rover module, a cargo module and a trailblazer module. The dupe appeared in the base, but the rover landed normally. So I had one dupe and one rover on the planet (my second rover on the planet, the first one built the beginnings of a base). I was building the base and had just set orders to harvest the meteors when I checked on one of my other colonies and when I came back I had 5 Dupes on planet. When the rocket got back to base the pilot and 3 other random dupes appeared on Glowera. Glowera lacks teleporters or even a landing pad as that is what I sent Joshua to build. I did disassemble the old depleted rover if that matters.