Thank you.
My map doesn't account for the odd sun positions in book 2, i.e., when the sun rose on his left over the mountains (which wouldn't be the case normally) because yes, if there is some sort of magnetic breakdown as the world moves on, then the cardinal directions would indeed shift.... however, I don't think we can say that they shift THAT much, because there are several points where Roland or Eddie judge time by the sun, saying it's 'on the western', or by Old Star / Old Mother, etc... so there still must be some consistency to navigation.
At first I thought I could argue that if Roland's world is a microcosm of existence inside the makeup of the rose that Jake found in the vacant lot that day he skipped out on school (due to the 'sun' inside it, and Jake's feeling of need to protect it because it's "sick"), then maybe the directions and way the sun rises and sets would be different... but because of the fact that the "sun westering" is used more than once as a reference to getting late in the day, I have to assume that it rises in the east and sets in the west, same as here.
The map I made seems to fill the void as far as how the linearity of travel ties together, but doesn't account for those few other things. In the end, while it'd be nice to discover some explanation that covered all of this, I am thinking we have to chalk it up to poor editing. That bugs me a little, because if that's the case - and how old are books 1 and 2 - then that means a lot of time has gone by without King addressing this or having it brought to his attention. At least I haven't googled my way to a statement where he himself explains all the points brought up in this thread.