The question mark and text generated is aligned top-right of the survey station by default. As you can see, in this case it would be better aligned bottom-left.
Is there a way of doing this?
Exporting continuation labels to the map was just something like debugging option. I would probably use ordinary labels in your case. If you definitely need to align it, you can do it by defining another custom attribute e.g. add "attr text_align top" and use this attribute in metapost code that generates this label. Unfortunatelly, I have no time right now to make it :(
(I'm using the 5.2.2 update, and I notice that the handy section at the end of the Therion book that comes with 5.2 has been dropped off.)
It was a mistake, I will fix it in next snapshot... Best regards, S.