Great to hear you made progress!
I actually haven't really played around with the map myself but I'd also like to find out how it works. Maybe it would be easier to do this more directly together on Discord and also I could have a look at that import bug you are having: https://discord.gg/4e3X36f
The different modes might actually be the different kinds of maps... Isn't there a dedicated map for the future, maybe it's showing those markers instead? The progress should be controlled by the dungeon open list. But maybe the modes also have something to do with it...