jQuery Library conflicts possible?

I had the 1.11.3 originally. My navicon rolled out and collapsed as needed for phone & tablet views.

Then, I installed the 1.12.2 to get the smooth scroll for anchors w/ the easing. So the 'core' 3.2.1 is also being called in.

Upon adding the latter, the navicon no longer functioned.

I realized, could it be a conflict with the library versions? I just commented out the call for 1.11.3 and removed the minified file off the server.

Still doesn't work. Now wondering if I should bring that back in, and use something like this:

Nemikor Blog » Using multiple versions of jQuery

Do you think this would be the issue? All was working before I added in the easing and updated library scripts.

And the class names for the anchors and the navicon roll-out menu are unique.

Thank you.