If you use 'show all pops' to issue Unload Minerals/or some installation orders on a colony in another system, the ship tends to move to the star (not the colony) and then fail the unload order. Also, I've gotten some weird issues with Show All Pops wherein I issue an order to go to one system, refresh the orders window, then issue an order to go back to the original system. However, the jump orders are all mixed together, resulting in an invalid orders list with impossible orders. In other words, the new orders are being interspersed with existing orders rather than tacking on the end.
(Also, issuing a show all pops interstellar move order doesn't refresh the orders window, it still acts like it's in the original system. Annoying, but not a problem per se.)