general problems of the 2008 Kia Motor Sedona

Bad misfire. This misfire started at 14,000 miles. I took it into the dealer to have it look at they cold not get it to misfire. As time went on at 20,000 the misfire became worse, we left the van for pm service with the first dealer for one week,we wear on vacation. They called and said that the van was ready,that was on a Friday,I went to pick up the van from the dealer. When I started it and put it in drive it started to miss. I had the service writer come over and I had him fell the miss and you could hear it in the motor compartment,the service writer had the mec look at the van,the mec said and the service writer said the it was the no 2 coil and that kia had a problem with that motor misfiring,I left the van and pick it up on Saturday. They replaced no 2 coil and one plug,they said they did ? the next day,Sunday we went to west palm beach for a craft show,the van sat for 5hr, coming home it misfire. When it misfires at highway speeds the cruise will go off,the trans shifts hard out of over drive then back into over drive, we have come close to getting hit on 95 when this happens. The misfire became worse,we took it to a 2 dealer out in coral springs,the van now has 53,000. They had it for 8 days, reset the ecm,and put new plugs in it. Got it back, still misfiring. The front brakes wore out st 21,000. Replace the brake pads,turn rotors, they last only 27,000. Very bad on brakes. First set of tires 24,000. Replace them with goodyear 70,000. Be lucky to get 40,000. Very bad on tires. Front end to heavy,eats brakes and tires. Had right front cv axle replace do to bearing&seal defect. Right rear bearing hub replace do to defect. We don't fell safe in this van!.