The solution is one of the following. Not sure which.

If town A is has less extreme slope than town b then town a could be higher than town b while town b is on a higher slope than town a.

This could also be a game of sea-level. If town a is naturally higher than town from sea-level it can be considered higher than town b but town b is at a higher distance from sea-level than town a if there is a massive difference in the level of the sea from one side of a mountain and another.

Town A is higher to town B but town B is higher off the ground. See my pic.

your pic helps but it doesnt tell the full story as i point out that there is two possible answers to this.

slope isn't involved ,it is very simple , no mathmatics , topograghy, or cartography come into play outside of one town being at a higher elevation

then it is not logically possible unless one town is full of stoners

answer pelase before I go to bed. PM if you have too.

it is completely possible , it is just like riding in on friday