The problem is easy to duplicate.
Create a new measurement file
Add new known measurement (A23 waist_to_floor)
the name of the new measurement will be filled in as "waist_to_floor"
The formula will be filled in as "(height_waist_front - leg_crotch_to_floor)" which is incorrect
The description will be filled in as Vertical height from Waist Back to floor. ('Height: Waist Front'' - 'Leg: Crotch to floor''). which is also incorrect.
Waist_To_Floor should be a simple measurement, which is correctly shown on the measurement diagram. Even if it were to be calculated, the formula given would give an incorrect result.
should I create an issue to document this?