I know! My older son was such a great sleeper and had such a great routine but then I could work around him as he was the only one but with ds2 we have to work around nursery and other activities we do!
He seems to have gone back to sleeping longer in the afternoon again so wondering if teeth were affecting him but we are back to 5am wake ups with no resettle -if it’s not one it’s the other
I think he would prefer s really long a time (but sure what the a time should be for a 9 month old) have a long nap then a short nap in the afternoon to see him thoroug to bed but it just doesn’t work with our routine!