mvveelen:
That's the problem :
The "all news letter subscribers" don't include the "nieusbrief-lezer"....this "nieuwsbrief-lezer" is somebody who is NOT a customer, but IS a person who joined this seperate newsletter.
Somehow they are not merged into one list if you can follow me.....
I believe they probably are merged. (Based on the fact that I am running this on 3 different sites and it works correctly on all of them.)
Remember, just because someone is a customer that does not mean they are a subscriber. You have 17 customers - have you looked at all of them to see if they are subscribers? (The only way to do this that I know of is to go and look at each customer profile to see if they are subscribed.)
I would bet that the "All Newsletter" list (which shows 15) includes all the newsletter only (nieusbrief-lezer) AND the customers who have chosen to subscribe. My guess is that not all 17 of the customers chose to subscribe to the newsletter.
As to your frustration - I know it is frustrating when there is a problem, but remember that this is a volunteer thing. NotGoddess has always been ready to help when she can - but sometimes people have other things to attend to in life.