Weird Add Content problem? I have been dabbling with Drupal 7 and I am not quite sure what I did but turns out that after the interval of that mindless exploring, if I decide to add a specific Content type, it redirects me straight to only one content type (a custom content type I created using the Add Content type option) without consenting me on what kind of content type I specifically want.

I am not sure where I goofed up but does anybody know how the 'Add content' redirects you to a specific content type happen. Maybe I disabled the existing content types somehow, but I am not quite sure.
Try looking at Content > Content Types.  If there is only one content type listed on this page, then it means you probably deleted all other content types.  This may be your problem.