I have been reading the entire post again and i,m noticing tha maybe there is an undermistaken.
My fault for sure . I think that have not been able to express the case correctly.

I have not mentioned that the engine has been running with this cam and lifters previously.
I rebuild the engine on a stand,adjusted the preload,prelubed it and installed on car.
Then i did the cam break in.

I started to do the valve adjustment again because i removed the rocker shafts to correct the clearance between rockers because i did not a good job on this while engine was in the stand.That is when i found the issue with the two lifters.


I did want to clarify this because you are suggesting me to prelube the engine and maybe i confused you and you are thinking that i still haven,t started the engine.

Right now i don,t know if it is usual to prelube lifters wich has been alreay working on a running engine or if you need to do this every time you loss the preload,like this case that i have removed the shafts after running the engine.
I,m a little confused about this.

I apologize for the inconveniences
Thanks