We do not advise that the totals should all match as they are measuring different things.
The Caseload Summary card shows the total number of learners sorted by their programme statuses as listed on the side. For full details of each status please see this article: Performance Dashboard - Caseload Summary drilldowns.
The Off-The-Job Hours card shows the number of learners who are behind target and ahead of target.
Please note that the Caseload Summary card does not include learners with a future start date, and the Off-The-Job Hours card does not include learners who are on target. These are some reasons for the difference in totals between the two cards.