Edit advpoll_ranking node -> Add Choices -> Raise Poll settings: Maximum choices to match # of choices: non-fatal error message.

The error message received is:

Maximum choices cannot be larger than the number of choices submitted.

The problem is that the maximum choices available are counted prior to new choices being added in the node_save hook.

The current 'workaround' is adding additional choices, saving the node, re-editing the node, then raising the Maximum choices allowed dropdown to match.