Excuse me answering this, mods.
The study time allocated to each lesson and test and shown on the program as 'hours per week' is a notional time , not a record of the time you actually spend.
The times were calculated from data collected from 18 months throughput of CTC students who were, at the time, using a slightly different web-based system that allowed the actual time taken on each lesson to be recorded.
It is meant to be an assessment of how long a typical student will spend on ATPL Digital. Of course, there's no such thing as a typical student and you may find you spend more time in the lessons, or possibly less. It doesn't relate in any way to time spent in the manuals or online.