Tiled model space is mirrored???

[Horizon09]

Somehow cruising along with my Carlson drawing my tiled model space (or the model space when looking at it in paper space) got mirrored. I have never seen this before. When I go to the model space tab everything in model space is fine. But on the paper space tab, everything in my viewport is mirrored. No idea how this happened and no idea how to fix it. Help! So bizarre...

[Horizon09]

Not having enough patience, I figured time travel was the best solution here. I have my automatic saves set to every THREE minutes. So I just pulled out a previous version of my drawing where it's correct and just saved over my file. Problem solved. No work lost. Just the time spent scratching my head over this.