I have two Launchpad accounts. Can I merge them?

I have managed to create double Launchpad.net user accounts (with different emails), so question is:
* can they be merged, or
* if not how to delete another one,
* and can I still add mine e-mail(-s) wich were registered to a deleted account to the one wich would be remained, or will they remain locked.

This happend, as I created one account few years ago, in purpouse, I can not rememer anymore (probaly tried out Ubuntu) and forgot that account afterwards,
and created another one in last year, with different e-mail (even thought, previous one is still in use), when tried out another Ubuntu based OS, and wanted to use ubuntuone service. Discovered this by tring to add mine alternative email, which were locked to first account.

It's pointless for me to have them doubeled, as I (if at all), only will manage one, and I belive that I simply forget the existance of the first one.

Both emails are activly in use, but I simply dislike that I have accounts doubled (this was not done with purpouse, to have extra storage or something).