[triciaunderwood]

not sure if this helps but try it--I've seen other posts telling people to actually sit in the car seat/booster seat and have someone else tighten the straps--The reason given is that car seats need about 300lbs of force down on them to adequately tighten the straps... ?? I don't know if that part is true but it worked for us. The seat initially flopped around but my husband sat in it and my dad pulled on the straps and now it never moves.

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law.