weeks now start from mon. case 603 returns progress_level_id.

weeks now start from monday instead of sunday. case 603 returns
progress_level_id.
Addition of joint_id parameter to differentiate between activities.
fixed silly mistake in case 603
Revert "Addition of joint_id parameter to differentiate between activities."

This reverts commit b91eac429d619f6bfced19d54b37cd4f3eadc387.