Toyota Tercel rear shock absorber

Well my problem is the following the rear shock absorbers of my Toyota Tercel 98, when I pass a bump or some hey they make a strange noise buy some new ones and change them but the problem follows I realized that one of the 2 shock absorbers to take the tracera part of the seats the upper part of the shock absorber goes up and down when pressing them that happened before and after changing them some help
would be appreciated.

Hahaha sounds like battery saucers, it has happened to me or is lacking or are bad putting the buses, on occasions I have had to buy higher turtles to put them, nothing serious or difficult to make a dog, luck

To change the bushing, only the tortillos above the shock absorber are loosen or you have to get the shock absorber and put them down because if I release the screws that affirm the shock absorber, it would be uploaded or not?

Sipilis trajas on the shock absorber, but if you want you have the complete stick and change those below and the above so that you are safer.