Hi Again,
After looking further at this, as mentiomned in the lp bug, because the account is a “Verified” one the changes to the display name in ubuntu one/SSO are not surfaced to {dashboard.}snapcraft.io in order to not mislead consumers while the publisher is verified.
What we could do is to remove the Veirfied status from the account, which will enable you to follow the steps in How to change your publisher name to change the display name.
Please, let me know if I shall proceed and do it.
Cheers