I am drawing and annotating simple elevations in AutoCAD LT for mac and have been using the same annotative dim style for the last couple of years.  It's been working fine until this week.  Now, it displays correctly in model space but in paper space it displays at a size that is bigger than huge. 

I have attached a screen shot of one of my PS layouts.  The top left viewport is displaying correctly, but as you can see the other viewports are not scaling down. 

Has anyone come across this before and do you have any thoughts on how to correct it?