WIT: Why are the list ranks not being shown in WIT for the latest survey?

When going into the Preferences page of WIT and the List Position is blank for the latest survey (like in the screen shot below), this is usually due to the survey not having been published.

However, if the list results have been published and the rank is still not appearing, then this will be down to the "WIT Ranks and Benchmarks" Survey Key Date for the list survey entry still being set to some date in the future. It is this key date which determines whether or not the list positions are shown in WIT.