Time and time again we see examples of the total lack of communication between KL and DL systems, possibly the root cause of these symptoms.

The green check mark IME indicates that the pax has been informed of (and agrees to) the schedule change. Until that point it is a pinkish red message which then changes to green.

Depending on how long it is until these flights take place you may well expect more schedule changes from DL. They do it regularly, sometimes just updating an ETA by 1 minute.