its the dbols making your lower back tighten up, not the dead lifts. i am not a fan of dbol because as soon as you stop dosing them you looses all that size and srength. anadrol is the same way. BTW have you noticed any difference in your urine since starting the dbol?
i like to take a slower approach to gains that are more permant. deca is some great stuff. test should always be included in a cycle. true you loose some of these gains with test but not nearly as bad as dbol. drugs for slow steady permant gains are, deca, Winstrol (winny), hgh, tren, eq, masteron, etc...since these hormones lean more towards the anabolic side than andro there are less sides and longer cycles are possible. or do like many and never come off. with advanements in Anabolic Androgenic Steroids (AAS) profiles, anti Es and the ability to get the HPTA kick started (clo and hcg) staying on year round can be done safely and effectively.
test/tren is a great combo for putting on good size and strength. another good thing about tren is that at higher dosages it will lean you out. it is a very versitile hormone much like hgh. good luck