When I get "runners" it is almost always after an ALT-{key} is pressed and usually while I am in motion.

My macro for dismount and trinket swap is mapped to ALT-PageDown for all accounts. When coming in for a landing on my bird or riding in on 3 mounts I'm usually holding down the W key so that when I let up I'll stop (after cruising on auto-run for a bit). At the same time I press ALT-PAGEDOWN to fire my dismount macro (which dismounts and change trinkets) but then my 2 clones following me sometimes go running off on their own even after releasing all keys. I can turn them using the mouse to run them back to my main but just doing a back movement key does not stop them, lol. I don't recall ever having runners if I ALT-{key}'d anything while standing still except for tonight when I stupidly forgot my dnp button down was pressing W then pressed and alt-key and had 1 runner, lol. Until these kinks are worked out I'm looking at it as mini-games that only keyclone multiboxers can participate in!