Parked Domain Question / E-Mail Option?

I have noticed a new option of parking a domain, that feature works great. But there is also an option after that to add that domain to the users control panel, after doing so I do not see it in the users control panel.

Yes, I am using a custom theme but to test I put it back to a default theme, and I have tried them all I think.

So am I wrong on what this option should do?

I thought that a person would be able to set up seperate mail accounts for a domain parked under there account?

Also, is there an UNpark domain feature?