Rear Coilovers Shifting in Height

[b_ron]

I installed some Tein Basics last week and adjusted them to my desired ride height
Just before going in for an alignment, I noticed that the rear passenger side was about 1/8 to 1/4 inch lower than the other side. I drove it around for a couple days and it evened out. Got my alignment and it was still even. Now my rear driver side is about 1/8 lower than the other side.

Why would the heights keep shifting?

[whatsvtec]

Springs might still be settling.

[b_ron]

how long does it take to settle? the fronts are perfect
i bought these used. struts weren't blown.
coming back from work, now the passenger side is just a smidge lower.

[Pandamanda22]

this happens with my rears too and not my fronts.. I just thought it was because racelands were shitty but idk about teins..