Re: Word Templates Opening Multiple Times

 I have one macro that finishes in 11 seconds in 2010, but takes almost an minute and half in 365.

As for the timing difference Word 2010 and 365, my guess is that you have something else going on like different Add-Ins. If you start Word in safe mode, what happens to the times for running the macro?

Open Office apps in safe mode on a Windows PC - Microsoft Office

If the difference is really there and that pronounced, I recommend posting the macro in a separate question to get help on it.