Initial Project Schedule (IPS, or Baseline schedule) had been approved. Several monthly updates were approved. The owner has requested KTR to incorporate a score (20) of new activities from the contract modifications into the schedule, with contradicting directions, i) first, "all twenty activities at once" ii) then later, "just new activities that falls into the duration of the monthly update this time (and repeat the same for the subsequent updates.)"
It looks like if I do ii) 'only the relevant activities for the update duration', I would lose opportunities for time extensions that I would surely be entitled to get if I do i) 'all at once.'
Is there an industry standard in reflecting new activities added from the contract modifications? Can I insist to go with i) and how can I convince them?