If you send an email from the account to yourself, does the wrong sending name appear there as well? If a sender has a different name on their end for your address, this will overrule anything you have set on your end.
I just looked at the mailbox and I see a message showing the "Oana Antohi" name.If you're not sending from the web, you may need to edit the settings in the app you are using separately. Where are you seeing it differently? Can you give a specific example?