Why is geometry randomly moving in drawings?

Hello,

Has anyone had any issues with geometry (offset from part) randomly moving on a drawing sheet?  I've had this happen on two drawings in the last few days.  The first time this happened I simply ignored it and recreated the image.  Just wondering if there is a setting or known glitch that may be causing this. 

I've attached two sheets.  The first has the set of holes moved down and to the left.  The second (correct) has the holes centered in the two rectangular boxes. 

SW 2013 x64 SP5.0

Thanks,

Michael

SolidworksDrawings And Detailing