ATC says " you are going to 20" probably because they saw aircraft visually going right downwind for 20 having been too high for landing on 02. Now there's a potential problem because the next aircraft is already on finals for 02. For the uninitiated it is not normal to have aircraft landing from opposite directions at the same time on the same strip of concrete, so 211 has to keep out of the way until the runway is clear again.
One clue to this accident is likely to be that 211 had cancelled IFR and therefore the responsibility for avoiding other aircraft was his and not ATC.