A member is impersonating me , by using my profile picture and name


Which account are you talking about?
If you don't want to be accused of naming and shaming, you could at least give us some hint as to what you are talking about.

Open a ticket with support about it:
https://support.chess.com/collection/343-contact-us

I thought it wouldn't be the exact same name and I don't see how it can be.

It's not the exact same name. It's using capital letters to make it look the same.
Like @martin_stahI

When I click on a member's name in a thread post to get the "More" button, clicking on this "More" button causes the "More" menu to disappear. This happens to me for any member I try this on. Obviously, this is a recent bug that some programmer introduced.
If I go to a member's profile, everything works OK.
And, no, I won't report the bug. It's not my job to perform worthless tasks. ;-)

When I click on a member's name in a thread post to get the "More" button, clicking on this "More" button causes the "More" menu to disappear. This happens to me for any member I try this on. Obviously, this is a recent bug that some programmer introduced.
If I go to a member's profile, everything works OK.
And, no, I won't report the bug. It's not my job to perform worthless tasks. ;-)
That has been reported.
I guess we'll have to play "To Tell the Truth":
https://www.chess.com/forum/view/off-topic/hi-guys-38
https://www.chess.com/forum/view/off-topic/woolly-84
It's not the exact same name. It's using capital letters to make it look the same.
Like @martin_stahI
You could always display the handle as all lowercase for an easy fix
https://www.chess.com/forum/view/community/i-and-l-are-not-the-same
The op, in a previous account, was fooled as well.
https://www.chess.com/forum/view/off-topic/who-is-this-guy-idiiis