Who I have the same questioned this topic

I am constantly running into a situation where my son is not receiving messages I send to him from The verizon messages app on my windows desktop. 

1. He and I are on the shared plan. 
2. Messages from the desktop will get to him for a while and then suddenly stop going to him
3. Messages from message plus on my androit WILL get to him
4. Messages from the browser app at https://web.vma.vzw.com/vma/web2/Message.do?n=1&s=1fVrdjSgEyfJ4GSI
5. I have no problem sending messages to dozens of other people using message plus on my desktop. 
6. I've deleted and reinstalled message plus a number of times with the same cruddy results. 
7. The desktop message plus version is 2.0.2.0
8. When I go to the link above I click on the desktop version to try to see if there is a new version. HOWEVER, THERE IS NO WINDOWS VERSION LISTED.. JUST ANDROID MAC AND IOS. 
9. If I send from the windows desktop app, the message does not show on my phone, his phone or the browser app
10. If I send from my phone, it shows on his phone, Desktop Message + and the browser app
11. If I send from the browser app, it shows on his phone, desktop message + and my phone
12. This is completely unacceptable. A multi billion dollar messaging company can't seem to make a simple messaging app that works. The UI is garbage but I could live with that. What I can't live with is trying to send messages to my son where they fail to send and I get no notification. 
    
    So, my questions
    
    
    
13. Is there a newer version of message plus available for the Windows desktop? 
14. Why the heck are messages to my son failing to deliver to him. ?
15. Do you plan on ever fixing this? I have seen other people with similar problems.