Hydraulic Power Assist Steering System problems of the 1999 Dodge Intrepid

1999 Dodge Intrepid ES 34000 miles: steering intermittently is very loose and awkward, steering sometimes is tight like it should be. Steering wheel has limped to the left several times while stopped or driving slow and steering feels really strange. When steering wheel is moved back and fourth quickly only from left to center when vehicle is stopped there is slight knock or bump sound in steering. Steering wheel jerks to the right during medium to hard or hard acceleration sometimes in automatic usually in autostick. When steering wheel did not function and return as usual a couple times I almost wound up in an accident. Vehicle sometimes also sways funny when steering is acting up. The steering's sensitivity and attitude intermittently changes. Sometimes there is a slight vibration felt in steering when braking or driving. There is sometimes excessive movements in steering. Brought vehicle into hayward auto Chrysler-Jeep dealership where purchased several times. Dealership found missing left strut washer, replaced. Dealership seems to never be able to duplicate or find problem. Technician (supposed shop foreman) did admit he felt the slight vibration in steering when braking while on test drive but did nothing about it and couldn't really explain it. Dealership said they'd put it on alignment machine and check for anything loose when I brought it back for spk replacement. They just told me it was fine with no data from supposed alignment. The car has had many problems since purchasing it with 28000 miles and I feel they are sick or seeing it. I strongly beleive they did not put the vehicle on the alignment machine or check for anything loose since they are sick of seeing it and beleive there is no problem. I have had others drive my vehicle when the steering is awkward and they all verify that it does not feel right. I have test driven two similar Dodge Intrepids and both of them do not drive or steer like this. I am taking the vehicle to another dealership soon.