Okay, so my clan warred 6 days ago, verse WAPOW, and won some points.
This took my clan to 780.
My clan then warred again today, won 10-6, and it took our points back to 768?
Why are points deducted, in general, and how is that fair?

Full story? Still no explanation there.
Also, I'm asking why they drop in general - I do realise it's for not warring.
What's the theory behind it?

Also, this only started happening for the past 2 wars my clan executed...

Could be point decay. Happens over time.