I think there is an issue while formatting Date column. When you click on date column to format cell it by default shows the text-align to right even though it is on left and this happens in Flat format.
Thank you for reporting about that issue.
The fix is going to be provided with minor update ETA 30 Dec.
Our team will inform you when the version with a fix will be available to download.
Please, contact us in case any additional questions occur.
We are glad to announce that the inconsistency in
textAlign format when formatting
"date string" in the flat form was fixed.
This is available in the 2.7.22 version of Flexmonster: https://www.flexmonster.com/release-notes/
You are welcome to update the component: https://www.flexmonster.com/doc/updating-to-the-latest-version/
Please let us know if everything works fine.
Looking forward to hearing from you.