If the springs are starting to bend (settle out) an add-a-leaf isn't going to correct or stop the problem...the main springs will start to bend past the end of the add-a-leaf and eventually snap! Matcheen is right, get pictures AND measurements (park on level concrete or tar, measure from center of shackle bolt to the ground, all 4 springs, both bolts on each one) If any spring looks like it is going 'flat' (settling out) get good picture of that. If you get nothing but 'black' pictures with poor detail under the rig, get a sheet of poster board and stand it up behind the spring-gives you contrast and the spring will show up great. Then write down tire size, etc. and double check tire pressure-have them all equal...send it in to the tech department of the manufacturer and ask what they think! It happens-you could have gotten bad springs and may end up with new ones!