coilover preload changed on its own?

[JoHn E]

recently my front left coilover has been clunking when i turn, so i put the car up on a jack to look at it. i noticed that the front left coilover spring has a lot more preload than the front right. less than a year ago im SURE that the preloads were even on both sides. on the front left i can fit 3 fingertips in the area where u can touch the thread of the coilover. on the front right i can only fit 2 fingertips

has this happened to anyone else that has owned coilovers?

heres a picture. the section i highlighted in red is where im talking about how many fingers i can fit in