I have a few questions:**. When i go to my Whatsup page I can that right where I had a...

I have a few questions:**. When i go to my Whatsup page I can that right where I had a double blue check mark now there is a single grey one. What does it mean?**. I have been sending sooneone messages until April ** and they always checked them. However at April ** up until April ** that single gray check mark appeared and I want to find out whether they actually read my messages during this period (**-**) as I sent them. On April ** they finally replied saying that their what'sup had been inactivated. Along with that message appeared the box informing that they changed the security code. And all my messages that I had sent through **-** acquired the double blue check marks. My question is: does it mean that they have rose messages as of April **(today) and second is (I really would like to know that!!!!!) whether they had actually had been reading them (April **-**) when the single grey check mark was on.*Could you be so kind to answer all my questions? It is VERY IMPoRTANT to me!*I would really appreciate your help. I am waiting for your answer. Sincerely Dora *** *** ****