Yeah, unlike other dev environments, clicking the breakpoint enables/disables it. To remove it, you can right click and there's an option to remove or click and drag it away in a puff of smoke.

Also, note the way you run your app. Building is building but you have choices as to how you want to run it. You can Run, Debug, Attach to a process, or run it in a performance too. The "Go" option or "Build and Go" executes the last choice you made for running. So if you debugged last time, "Go" will debug again.

Not sure what the difference between "Run" and "Debug" is as far as how the breakpoints work but I'd assume that Run would ignore breakpoints.