When i purchased the jeep in July i did notice the drivers seat seemed to sit funny, on a slight angle sideways, had a nose around it today and noticed a steel anchorage point was broken. sussed out why this has happened, where it pivots on the front anchorage points the door side pivot pin had seized solid putting strain on this bracket causing it to fail. Now in two small halves and the lower part seized solid i decided to make up a small bracket from over the counter sheet steel. Made a temp-let out of some painters masking tape. drilled three holes to fix it to the broken upper and lower seat frame. The lower seized part is now free after a squirt of penetrating oil and a wiggle about with some grips. To prevent this happening to your jeep a little squirt of oil on this pivot rivet should stop it ever happening. I may double up on the steel bracket i have made for extra strength. Will take some pics when i fit it hopefully tomorrow.
Some pics of the seat repair on my grand cherokee 2003 diesel overland. The seat is now stable and working great. Could only get one bolt in the top of the bracket, and two in the bottom, not much metal left to fit a two bolts in the top, the one bolt does its job although the seat pivots at the top bolt now opening up the break in the seat like a birds mouth, still solid and no more wobbly side ways movement. could have had it welded but so far this repair seams solid and feels durable, and cheap job too.