Why do I need to press C twice to copy in Mac MS Word 2011 and 2016? I have had this issue for years with MS Word 2011. I upgraded to MS Word 2016 and am still having the same problem. I can only copy if I press command, then double press C while holding down command. Just pressing command-C does not add anything to my clipboard. 

How can I fix this? This problem has continued to haunt me for years, even after I did a factory reset on my Macbook, have upgraded Mac OS X several times and also upgraded MS Office. Thanks for the help.

If I hold down command-C for a second, I only have to press it once. Regardless of how long I hold it down, I see the Edit menu in the filebar flash blue... even if it doesn't copy anything to the clipboard after the first (or sometimes even the second) button press.
Please loot at this:
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_word-mso_mac/often-have-to-cmd-c-twice-to-copy-mac-office/0a3060eb-d185-46df-943d-3ed89f447d25?auth=1

When I disabled the three fingers drag, the problem have solved.