Delete an unassigned number from my profile?

[BrownBullhead]

I bought my MJ+ one week ago. So far, I am happy with all aspects except one - you can't delete an unassigned number.

While doing the setup, I errantly chose a USA free number. Being in Canada, I wanted a Canadian #. I paid the $20 and did a number change.

But, now the USA number remains on my profile under unassigned numbers. I realize this may seem a bit obsessive/compulsive, but why can't you delete unassigned numbers? I did the live chat to no avail - "it can't be done".

Is this correct?