Blender 3D 2.75a Beveling Tool Issue I have a a problem with the Blender 3D Beveling Tool. I have it set up to bevel any edge with a weight of 1. This way I can select the specific edges I want beveled on my project. However I'm unable to Bevel the bottom edge and I'm not sure why.

When I select the bottom edge and move its weight to 1, I end up with this 

So I'm not sure what I'm doing wrong. I started this object out as several Planes that I connected together. Does anyone see something I'm just failing to take into account? Here is a screenshot of the Bevel Settings


Any advice would be greatly appreciated. Just can't figure out why its working on the side as shown in the first picture and not the bottom. The Screenshot shows the profile as 1.0 however its actually .99

Additionally I am using Blender 2.75a. for whatever reason I cannot mark it as a tag.
The stripey effect near the corner (known as z-fighting) would indicate multiple faces in the same location.

In edit mode select all vertices then remove doubles. You can find remove doubles in the specials menu W or in Mesh -> Vertices -> Remove Doubles