schedule shmedule

So we have been on a fantastic schedule (and understanding) for two months now!
Two 30 min naps in the morning and two 30 min naps in the afternoon...bed by 6:30ish.

The last few days he napping longer and yesterday he gave up this 2nd afternoon nap, which made bed time a HUGE pain. (still in bed by 7:15) but it through me right off. So does this mean he doesn't need to sleep every 2hrs like he did in the past? (even though he seemed dead tired yesterday as he fought his nap). I don't get it, He's been sleeping 2hrs AND now hes sleeping through his 12:00pm feeding.

Just when I think I have him all figured out....