If we all waited until we were 100% accurate before critiquing anything, then nothing would ever be critiqued - calm down and take your own advice.
This is a classic example of duplicate content in the SEO sense: there are multiple separate URIs which present the same content to the user. That's definitionally duplicated; the fact that it's down to badly-implemented load balancing is irrelevant.
The obvious correct solution would be to handle the load balancing at the DNS level, or with a single canonical load-balancing endpoint. If that's not possible, then using <link rel='canonical'> tags will indicate to search engines that the URIs point to the same resource, allowing a single canonical URI to be defined.