Your normal company working week is configured under Settings → Timelogging.

This defines when time should be treated as:

• NT — Normal Time
• Tx1/2 — time and a half
• Tx2 — double time

It also defines standard breaks.

If somebody works a different pattern, their own Working Hours settings can override the company defaults.

If Brisk is splitting somebody's time incorrectly, check their Working Hours and breaks before manually changing the timelog.