Yeah, I know that now haha. Thankfully i only printed the smaller model and not the larger one. That gave me the opportunity to fix my large model before printing it.
I still don't know exactly what went wrong (although the models do have internal walls/faces since they are assemblies of smaller parts), but i figured how to fix it. I've been using 3dContentCentral to convert my Solidworks models into STL files. In my version of Solidworks when i export an assembly to STL it saves each individual peice as an STL instead of the whole assembly. Hence my using 3dContentCentral's nifty conversion tool to get around this. Apparently the problem occurs when i save the assembly as a Solidworks Part and then convert that, but i have discovered if i upload the complete assembly (and dependencies) and convert that to STL there are no problems. Weird, but at least i found a solution.
I really liked this page describing "bad edge" geometry. http://www.meccanismocomplesso.org/en/check-stl-files-3d-prining/