Hi Bobbie,
Well I don't know if this will help any but I got this from Dr.Phil 's website. I would answer these questions and see what you get from there. Here is his website address www.dr.phil.com, I'm not saying he will have the solution but maybe it will spark an idea or you might get an answer. I can tell you from my experience make sure without a doubt you and your husband back each other up when it comes to rules and discipline and you have each others backs. If your child does something and you or your husband disciplines him and the other disagrees on what the punishement was do not discuss it in front of your child(ren). You need to have them leave the room or go talk somewhere where the child isn't present and overhear you guys speaking. You have to be on the same page on everything. As far as where your child may have heard this... he may have heard you tell someone on the phone talking to a teacher, a relative or even your boyfriend. I would answer these questions below and see what you get and maybe where to go from there. From my view standing on the oustside looking in I can answer all these questions by what you have posted. Also you say he throws a fit like his younger brother well is the fit throwing his younger brother is doing does it get him the results he wants ?? If the answer is a yes than you now know that he seen it work for him so he might as well give it a shot.
Have you ever thought that maybe all of the activities he is in may be a little overwhelming and he is stressed out also.
Part One
1. My children can predict the consequences of their actions with a high degree of accuracy.
2. My children know they have to perform certain things they don't want to do in order to get access to things they do want to do.
3. My partner and I present a united front regarding rules and discipline to our children.
4. I adjust my communications to my child to his/her level of understanding, taking his/her age into account.
5. I am friendly and loving with my children yet I have established myself clearly as a respected authority figure in their lives.
Part Two
1. I choose rewards and punishments based on what works.
2. I reward my child for good behavior.
3. I parent without guilt.
4. I am sensitive to not over-scheduling my child.
5. I render discipline without anger.
I hope this gives you something to go on W.