Hi Ali
I understand your frustration. I can't tell you why there are such variations in delivery dates - I'm afraid it is just the system. The texting system is not always available, and notifications do vary. What feels like non-urgent to you may not be to another claimant. The system is far from satisfactory, but unfortunately, I can't see it changing soon.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems