I also use Evernote for task management, stored as individual project and task notes
It's not completely clear what your !.n tags are, but I gather it's date related
Personally, I sort on due date; stored in the Reminder feature
The Reminder feature also supports non-dated items
I use this for active Next Actions
I still have a problem with priorities
Currently I red flag items tagged Important/Urgent (Eisenhower matrix)
As I mentioned in your other post, I don't limit myself to Evernote's presentation of data
The note-list paradigm is just too constricting
For presentation, I take my data to spreadsheets
My GTD spreadsheet displays the data in a gantt timeline view; sorted by date