As a child care worker, from my point of view, some kids act differently with their parents then they do with the carers, I have one who very very rarely chucks a tanty with me, but with Mum, they are full on, could be anything from taking shoes off or wanting them back on again. Mum can't get her to budge, she will sit straight down and do what I ask.
This is what I was going to say. I found that my DD's are far more 'compliant' for want of a better word with daycare, little angels, listening and being 'easy' with the carers, but as soon as they get home they turn! Take the compliment hun! It's great he is so easy there. Could be a lot worse!