The Dragon simulation had a total of 5 missions, all of which were station resupply missions. They all involved taking a crew up to the ISS for 30 days and then returning them to Earth. In addition the missions featured the reuse of the center core booster, where it lands back at the space center (or attempts to) after jettisoning during ascent. These missions in the simulation had the lowest success rate due to the ascent trajectory required for the booster landings. The Falcon 9 uses a direct launch to rendezvous, which if the rendezvous is missed leaves a very wonky orbit, and the timing was sometimes off, causing dragon to miss.