OP,
I don't for one minute believe this is accidental.
I think he wants to be at home when you are there.
I would be deeply unhappy with this situation.
He really has you where he wants you.
Doing it all and feeling uncomfortable in your own home.
I bet this isn't in isolation.
He told you one thing that conveniently now has messed you around, and works against YOU who deals with the children most.
He has deliberately locked you into something that doesn't suit you.
Of vourse you are pissed off.
Most people would be furious.
IMO that is really controlling behaviour.
I think it is fair to say he LIED to you and I would now be thinking is he to be trusted in what he says?
There is a whole cohort on MN land that refuses to "understand" the WFH dynamic that some spouces don't like, most particularly with young children.
In real life I have not met one person who doesn't NOT understand that it can definitely be challenging, and for those with young children they can find it really annoying and huge pressure.
Of course you want the freedom of the house...end of.
You asked him, he gave you days, but he lied. That simple.
You have every right to be very pissed off that he couldn't tell you the truth and be depended upon to follow through.
Mind yourself OP because I think this is a red flag in your relationship and only you know if its a small one or a big one that has you joining other dots.