update lisbox column sometimes, but not always

[boltjoa]

hi. I have a listbox that pulls rows of data from the worksheet BList. what i want is this:
If i highlight a name from the list, then I want to update column O with the data from column T. if i don't highlight the row in the listbox, i want the data to remain what is in column O on the worksheet.

THEN i need to be able to sort the entire thing from highest to lowest.

thought this would be easy. i was wrong!