Feeding for almost 2 hours?

My baby will be 4 weeks old tomorrow. Today he ate every 2 hours- which is a schedule I try to keep- and at our 730 feeding he just didn’t want to stop. I’m here at 930 pm and he’s still going strong.

I have a lot of milk and he is breast and pumping and bottle fed. I know he’s getting lots. We do both so my finance can help. And it’s wonderful he likes both.

Sooo I’m just wondering if this is normal? Is it cluster feeding if it’s just one long constant feed?