A map is another way of saying tune I guess. So you can have up to 5 tunes available to load at any moment. You can have an E30 map, a 93 stage 1 map, a stock map, a 93 map with crackles and pops, 93 stage 3 map and switch between them whenever you want and have up to 5 tunes available. I don't have an Accessport yet so I don't know how to actually switch maps, but I'm sure you can find the manual online somewhere.
You're not running the E30 tune on 93 pump gas right?
Stratified crackles tune will have a crackles on every map slot in that tune.
Your e30 tune probaly has like, a low boost slot, or valet or something in it.
If you look at the file with the AP software on your computer, a lot of times it will say what is in each map slot in the description.