I used to be able to snap and glue connection points together in Visio 2003, but I'm having a problem with Visio 2013:
Shown below are the two connection points defined in the ShapeSheet, visible when I select the "Connector" tool.

Visio 2013 lets me glue the middle of the red circle to the inside arc of the teardrop shape:

But I know there is a connection point in the center of that teardrop, yet I'm not given the option to Glue to it:

Now, before you tell me to check "Connection points" under "Glue to"... I have it checked:

I also have a checkmark in the "Connection Points" menu:

In case there's something funky with the shape, below are some pertinent sections of the ShapeSheet:

Any guidance you could render would be greatly appreciated.
Thank you for your help!
- Matthew