Please don't show total when dimension only has one sub-item.
Said differently, show only total when dimension has at least two sub-items.
It avoids duplicated information
It saves precious screen space
It sometimes makes text tables fit in a dashboard
It improves readability
It looks professional
For visuals, this annoyance typically happens when one uses single filters.
It is therefore particularly helpful with requested feature when single filters are used.
1 Visual Example unwanted totals have reddish background
2 Text Example