Is this a new feature?
User came to me with a dwg file with about 14 pasted ole excel objects. Even though she pasted them as not linked, if she double clicked on them, excel would fire and the spread sheet would open to copied cell range. There was some link functionality in that the values could be removed from the cells but her case the last column would not show as deleted in the drawing file. A copy and paste special had to be performed again. She is running 2014 ACAD and I could replicate it in 2013 ACA.