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 sent a test email from the account to itself and it seems to match what's listed as your Sending Name in your Mail settings. Is there a specific email in your mailbox where you're seeing a different name?
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?