In client chat

When i close a private chat in the client, and i have multiple up, they all Switch spots and change which place they are in,

(so lets say if i want to close Chat 1, it would look like this) (Chat 1) (chat 2) (chat 3) (chat 4) (chat 5) then when i close chat 1 it would switch to this (chat 4) (chat 2) (chat 3) (chat 5) and every time i close a chat they switch up again. it makes it hard to keep the chat im talking in at that moment open if i want to close multiple.