Do you mean..... when you click on 'Write', the 'FROM' field is showing 'Name' <email address>. but the 'Name' is not the same as set up in Account Settings' - Your Name ? You have not composed or done anything at this point.

OR do you mean....in the 'Sent' folder, when you select to see an email you have sent and the 'FROM' says 'Name', but it is not the same 'name' as the one set up in 'Account Settings' - your name ? If yes, Sent copies of messages are showing wrong name/spelling, then check your 'Address Books'. You may have your email address in any of your address books and that 'Display' name will be used in received emails to you and in sent copies.