Hydr lifters, adjustable roller rocker arms, had some noise, tried to adjust preload did i mess up?

Writing this on a phone so pardon me for any typos :) So i had some lifter noise. Thought that I would just have to readjust my rocker arms and it woild get fixed. Asked the old owner and he told me that car has this camshaft: COMP Cams CL20-228-4 COMP Cams Xtreme Energy Hi-Lift Cam and Lifter Kits | Summit Racing

Long story short, decided to try and adjust the preload, followed the comp cams instructions (rotate the engine, adjust intake just when exhaust valve starts moving and adjust exhaust when intake is just over the maximum lift. Adjustment was tightening it until there wasn't any vertical play on the pushrod and then a full extra turn for preload.

Started the car up and the noise just got a lot louder. Waited a bit (max 1 minute, hard to estimate) because I thought that there might've been pressure loss during the adjustment and the lifters would just have to fill again.

Only strange thing in the valvetrain was that some of the lifters were very soft and some of them felt completely solid when adjusting. Soft ones were compressable with hand pushing on top of the rocker arm (almost 1cm), while the hard ones didn't compress at all. Also it was possible to get thst compression away with the rocker arm adjustment, however I just took the free vertical lash off, because I read that they should be compressable to some extent. The hard ones didn't decompress at all when loosened.


So, is there possibility that I caused some damage (valves hitting pistons or something else?) When i loosened the adjustment on pressurized lifters? Should they keep the pressure or be rock solid like some of them were? Should I just buy a complete new set of lifters and install it before diagnosing it further?