Multisite main site adding virtual directory in URL

Right not sure how to word that title, so forgive me for not being specific :slight_smile: Here is the problem.

I installed multisite on my main site ex:

http://www.mymainsite.com

The network site on Multisite is ex:

http://www.mynetworksite1.com

All runs fine except for one thing. When I access http://www.mymainsite.com the url become http://www.mymainsite.com/w2. Likewise a page http://www.mymainsite.com/aboutus, has now become http://www.mymainsite.com/w2.

I have no idea where the /w2 is coming from. It’s not in any config file, not in the database or anywhere else I can find. I never defined anything as w2 either. Does anyone have any idea what this could be?