AutoCAD 2014 File Switching

Ok ladies, gentlemen, and all the intellectual beings out there.

I am currently having an issue when multiple drawings are opened together/or seperately (yes I have tried both) and when periodically not working on the drawing file I have currently selected it switches to a different file that is tabbed that I opened. Is there something I can do to fix this, or is this a glitch that has yet been fixed?  In my work field I usually have anywhere from 4-10 drawings open at a time.

Thanks!

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