esmerelda you have probably noticed now that your question has been more fully explained on your previous posting.
When you thank people, they do not get an alert but it is probable that 95% of them would refer back to the question.
It is always good to know that the person asking the question is satisfied with the answer given, but there are a number of people unlike yourself who never bother to express their satisfaction or otherwise.
So thank you for making the effort (S) ☺