I've managed to resolve part of my quesion. If I clear all sorting & grouping I can manually change the order of tasks by dragging & dropping.
However if anyone can help with the the dynamic numbering I would be most greatful.
I want to use Tasks in outlook to prioritise my work however the standard High, Medium, Low is not specific enough.
I would like to be able to numerically prioritise tasks. I would also like the numbering to be dynamic so that when I complete say task 1 all the other tasks will move up underneath, or if I change the number of a task it will reorder appropriately.
Any suggestions would be greatly appreciated!