I own an OSTC Mk2N (lucky me

1) could it record the dive number in the detailed view and not the number on the front page of the logbook (I have to change it manually every time since the last dives are always labeled number 1)
2) could it record the gas mix instead of putting AIr automaticaly (yesteday I dove with Nx27 set on the OSTC but Air was downloaded)
3) could it record the name of the unit (that would be the text field where you can put whatever but usually people put their name) instead of putting HW Diver under the Diver header
Now for some non computer related questions.
4) in the program I set the width of the column (dive number, depth,etc) but each time I reopen Mac-dive it comes back to the original and not what I've saved so could it be saved
5) under the tag column, how is the information displayed when more than 1 tag is present ? Sometimes it sorts them according to the order I've typed them in and sometimes it looks it's done randomly.
I'm sorry, it's a long post for a first post.
Thanks again for the program.