First & Last Name do NOT show on User Management

I have a website, on which I have been using EasyProfile. I decided to stop using EasyProfile, and install Community Builder. Everything seems to work fine.

However, the First & Last Name fields show as EMPTY on the CB User Management page (on the backend and the frontend), while it shows correctly on Joomla Users management page and on EasyProfile pages.

After some research, I found that if I select the "Name Style" to be (Single Name Field), the problem is resolved. However, I would prefer to ask the user to enter the name in 2 different input elements (First Name) & (Last Name). Is this possible?

After further trial and error, I discovered that if I do the following, the user would be able to edit the name as 2 distinct elements.
1. change the Name Style to Single Name Field
2. edit the user's profile and save it
3. change the Name Style back to (First Name and Last Name Fields)

I have only a few users. So, I can afford to do the above steps for each one. I wonder if there a more elegant way of doing it?

Thanks in advance for your effort and time...

If the users don't exist in CB yet then running user synchronization within CB > Tools will migrate them over as needed. Otherwise it will not modify the users.

Thanks. I tried synching and tried all of the other tools. An error was fixed, but the above problem is still there. For the record, I fixed my records by manually following my 3 steps above. However, if anybody has a better way of fixing it than my 3 steps above, it might benefit somebody else in the future.

There is no tool at this time to correct this. The synchronization will only do it if they don't already exist in CB.