@gracejiyoung - of course that bit is now corrected and I see it exactly as the screenshot you sent - so that part is okay (just before pressing the tweet button)
The problem is after the share - once the tweet appears on twitter. In the case of recent similar tweets (shares from wordpress), I ran the urls through this link: https://dev.twitter.com/docs/cards/validation/validator
And the issue was resolved for those particular urls only which I ran through the twitter card validator.
For twitter shares of other blog posts (the ones i did not run through the validator), the eventually posted tweet still shows the author as @unlikedesign on the twitter page. The intermediate window that shows just before the share is complete is okay and you solved that issue for me yesterday.
Heres the link to the problem issue/tweet: https://twitter.com/unlikedesignco/status/461128449864642560
(Notice that the wrong author - @unlikedesign is used at three places, even though the tweet text says "via @unlikedesignco")