It's to be expected though and definitely an age where pretty much every kid goes through something. Clash of personalities and/or iconsistancy in areas of their lives are just a couple of the things possibly causing them to try to fight us for control. I'm sure the fact that the the OP's child is only their for 1 day a week plays a part. In my situation it's because I have 2 girls who are both leaders not followers who are butting heads to be the top dog. It's bound to happen so I'm just glad I can come here to vent so it's more tolerable throughout the rest of my day. It goes in waves too. Sometimes I rarely have to say anything whereas yesterday it was constant. 1 girl didn't even cross the doorway this morning and was already telling the other girl off, so before 9am I am already wanting to throw the towel in lol.