50% of the time they do not get there until and unless you make a manual claim via Diamond Club. That is supposing that you manage to get the ever-changing DC number in the correct format with the correct number of digits. As you will know, these change by the day, perhaps even by the hour, and getting Hilton (for example) and bmi (it's BMI again now, isn't it?) to agree amongst themselves on the same format is no easy matter. That could well be where your claims (and mine) keep falling down.