Each time you had the alignment adjusted did they actually move anything? Or did they just re-check it? If they are moving parts each time, something is broken or worn out to the point where the alignment isnt taking. Did you just take it to your local tire shop and have the alignment checked, or did you actually take it to a chassis shop?

99 XJ Sport 2 Door, 4.0L, 5 speed, all stock. Daily Driver
79 F150 Standard Cab Short Box, 400ci, NP435, NP205, 35" SSRs