Take on old people email etiquette

I hate old people.. Well I don't hate all old people, just the technologically challenged ones. 

For the last month, we have been in the process if trying to buy a house which, as many of you know, has it's shares of frustrations, setbacks and annoyances.  But what has annoyed me most is the fact that all the people involved do not hit the "reply all" button when responding to emails.   So basically my wife will send an email with me copied to it but the response will only come to her, so what was one thread becomes two of three disjointed ones.  

It doesn't matter how many times we ask to reply all because nobody listens and I'm starting to wonder if this is by design because they prefer to deal with only one person but, as most people realize, the CC concept on these email chains is meant to keep people in the loop, not encourage interaction and now I spend half my time forwarding responses back and forth 

Sent from my iPhone