Summary Weekly Load is different from adding the individual days

I’m confused as to how the daily activities tie into the Roadmap. When creating the plan it looks perfect with base, build, races and recovery and has taken into account training history.

The summary weekly total’s also match the Roadmap load. However when you add up the daily activities they don’t match the weekly summary! Probably best illustrated by a snapshot from plan of the week commencing 11th May.

7 hours on summary but only 4:48 per the app and adding the activities together.

Any ideas?