Also note that the community ID (right sidebar) is not necessarily the same as the ID displayed at the top of the page for the observation.
community ID = the lowest level at which there are at least 2 non-conflicting IDs
observation ID = generally the most specific ID for which there are no conflicts
The “ID cannot be improved” box is based on the community ID, so if there is one broad ID (say, order) and one genus-level ID, the community ID will be at order (not genus) and the observation will become casual.