When I was a kid the bands that are now labled as Post-Punk were called new wave (Blondie,Talking Heads, Wire and the like), we even had a new wave of new wave in the nineties. Some clever clogs journalist will have re named it post punk to keep it fresh or something.

Blondie

As I remember, there was a difference between New Wave and Post Punk.
At least in my perceived imagination.
To my mind, New Wave was pop/punk, or rather pop with a bit of an attitude.

OTOH, Post Punk bands were a lot more adventurous and infinitely more original.

Coming from the musical backwater that is Newcastle even bands like wire and probably suicide were labled new wave but it was ages ago now and I was never music savvy then(or now for that matter) I'm pretty sure I never heard of post this and post that until I'd left the fog behind.

You're right.
New Wave (bands not considered "anarchic" enough...for want of a better word) were hot on the heels of Punk, if not side by side towards the end and onwards.

The title of Post Punk was reserved for this lot;

pre proto post hardcore proto post punk post post rock?

The differences between New Wave & Post Punk are pretty easy to define.

Post Punk - The natural progression from Punk

New Wave - The corporate progression from Punk

Who gives a toss really? As long as we can keep digging and finding unearthed bands that distort genres I'm happy.