Hard to tell from the photo but it looks like the damage to the red shoot on the left is a physical injury not a disease. The gray shoot on the left is dead. I would say it is probably phomopsis but could be another disease. I don't see fruiting bodies on either shoot so it is just a guess from the photo. The second picture of irregular growth is a little out of focus in the fore ground but the growth looks normal with some vigorous shoots. The shoots in the background are weaker.

To help identify the "fungos" problem, I took some more pictures.

Thanks,
Best regards,
Pedro Lobo

Pedro, Sorry for the long delay. The second set of photos helped. They did not really look pathogenic to me so I shared with two pathologists who work in blueberries. One did not think they were disease related but the other thought that the gray spots and red speckling could be unsuccessful infections by a pathogen. They suggested you try a fungicide to see if it reduced the symptoms. Perhaps a dormant spray with lime sulfur would be helpful. Do you think this is causing you a problem or are you just curious about what is causing the spotting. I can tell you also that spotting like this is not unusual and is more common if the plants are stressed.

Hello Mark,
Thanks for the reply.
It is a real problem! All of the varieties have this problem. The most afected is duke. It is making them regress and smaller. 
I'll spray a lime solution and get back to you. Best regards, Pedro

Best regards,

Sorry, I suggested lime. I meant lime sulfur, calcium poly sulfide. Do you see any leaf spotting? You might also want to apply a fungicide during the growing season

Hello Mark,

Ok.
At this time they don't have leafs.
I'll pay attention to the leafs, in the growing season.

Best regards,
Pedro Lobo