Welcome to the Q&A Forum

I have never been worried that Google prefers to choose a copy from the page instead of the meta description. On the contrary, I'm happy with it. It usually makes it longer (up to 300 characters in some cases). And this makes the visible result seem a lot bigger in the rankings. As mentioned above that could really help with CTR.

if the domain expired, then there wouldn't be a backlink to your website (Moz's index might just be out of date for that backlink). if thats the case, no need to worry about it.