We considered showing the vote change in the results table, but this would get messy for multi-selection polls. Instead, we will consider a simple mod log when someone changes their vote.

As discussed, an easier approach would be to have a simple "Revoke Vote" button if enabled on the poll and the poll is still open. The member can then re-cast their vote. This will avoid unnecessary complexity of changing vote screens and logic and will allow members to revoke votes without re-casting.