Will check out the drop tuna thing, did you select swordfish + drop other fish? It only works if you're not banking. Which settings did you enable? Banking, drop 1, drop all?
As for port sarim going upstairs, will check it out and add a fail-safe there ASAP
As for tasks: choose the levelling task, so stop at X level, then type the level you wanna stop the task at.
So if I wanna get 1-40 fishing, I do something like:
new task -> fish shrimp -> stop at level 30
new task -> fish trout -> stop at level 40
and it should do those tasks in order