Asset with depreicate box not checked depreciating

I created a new tax book and ran initial mass copy.  I then ran prelim deprcn for the first month and several assets had depreciation that I did not expect.  I looked and it was because the depreciate box was checked.  I unchecked the box then re-ran depreciation.  The depreciation is still being calculated.  Any ideas why?  The same asset for the Corporate book is correctly not depreciating.  Thanks