Origin Icon Changed

Hi,

I opened this file today and noticed it was zooming strangely - it won't let me zoom out to infinity (and beyond) - it barely makes it out to the limits of the drawing. Then I noticed that the icon showing the origin 0,0 has changed from X/Y to N/E. And it has a blue line attached to it. I further noticed that some elements in a ref file don't show up in the right place - as if the ref was scaled up by a little - like 1.2 or so -  holding the center of all of the elements as a scale origin.

the ref is attached at 1:1. the ACS is what it should be. the drawing scale shouldn't matter, but it is unchanged. view is set to top. what else?

any clue about what got set (presumably by another user) while I was out of the dgn? see below image for the blue line icon.