Note that the banned strike through is independent of any group things. It's something we only show to moderators. If you are adding users to a banned group, then that styling would be applied globally, but it follows the display styling rules. Given that you have a value of 0 here, it's very likely that's the cause.
Nothing in XF changes the primary group, so unless you're manually doing this, any automated system always adds additional user groups, so the user would be in at least 2 groups.
hmm i dont know why but the user was a banned user
verry strange because i only use the group to ban users
this problem has been solved but the other is still there.
Thank you