I’ve done this before and my little man was fine, it’s hard to keep track of things when your tired x
Honestly the guidelines set will be so overly cautious I don’t think you need to worry! I tend to allow up to 2 hours anyways especially if I have made it all from boiling water - not recommending this, just admitting it’s what I sumometimes do!
I've been guilty of this in my sleep deprived state! She drank 1oz then fell asleep and I thought it had only been an hour when i woke up and it was 3 1/2 🙈 She was absolutely fine though! Ive seen plenty more moms do the same accidentally Just make sure his poops are still normal and he doesn't get belly ache or sick but theres a very very low chance he will get poorly