More Carb Tuning Questions

Well, the problem seems to be fixed. I took the carb off and replaced the cheap thin gaskets that came with the 1" phenolic spacer with a couple thicker one, put the carb back on, and it idles really well now after a couple adjustments.

I noticed something about one of the manifold vacuum ports on the base plate though. The port is not being used. When I pull the vacuum cap off while the engine is not running, a little bit of fuel comes out. Not sure why this is. Any one have any ideas??? I've circled the port I'm talking about in the picture below.

vacuum.png