Am I overreacting or is this disrespectful

So me and moms sons father aren’t together and he primarily lives with me. He sees his dad maybe once or twice a month and I’ve just gotten his sleep schedule together over the last 2-3 months. I sent him dad his entire schedule asking him to follow it as much as he can because I just got him on it. ( his dad doesn’t keep him for long periods of time maybe 3 days those two time he gets him a month also I pay for almost all of our sons necessities he rarely helps so all I ask is for him to not throw his schedule off) today i called to speak to our son around 7:30 since he should have been up and getting ready for bed. He doesn’t answer telling me our son is asleep when he shouldn’t have been cause now he’ll be all night. But this isn’t the first time he does this a lot when he’s over there and then I have to work to fix his schedule. My mom said I’m overreacting because I can’t control what he does with our son when he’s over there but I just feel like im not he’s 10 months old and needs routine and it’s not good for him to be up all night and then I’m stuck trying to fix that and then continuing to get no sleep. So am I overreacting