Xcode Committer Name Problem : Same name but one is user, one is not

Question

I'm standing a very puzzling problem here. This is my git commit history, and until three days ago, my commit (and history) worked totally fine!

Contributed as username, and hyperlinked to user page

As you can see the history, the icon and id is there, and I can click the id and see it is ME! Plus, contribution was made in MY history with green marks!

Calculated as contribute of MINE

However, here comes the problem. I registered git account in Xcode->Preferences->Account, and also in Xcode->Preferences->Source Control->Git, I added Author Name as 'edd3173', which is my user name and Author Email as '[email protected]' which is my GitHub email.

Then I did some coding and committed them. Then the problem happens! The commit I made in Xcode is SAME name but NOT mine! It is not clickable(so not hyperlinked to my GitHub user page), and this commit is not calculated as my contribution in GitHub! Look at the picture: There are gray areas, I committed in Xcode so not 'contributed' by user(me) Same User name, but not-hyperlinked, not contributed!

Uncontributed Gray Areas..

I googled for some answers but it is really hard to explain this situation in appropriate gram marly word, and it's also hard to find it. Can anyone help me with this?

One prediction is that, this problem happened three days ago, which I changed my Macbook. I created this repository with my old Mac, and cloned it and keep working on it in my new Mac. Of course, GitHub user id is same, even device is different from old.

Thank you.