Bc2000 (for the BCF2000 & BCR2000)

Hi everyone,
I'm from Aregntina, so sorry for my english. I'm new here, and I'm having a little problem with some push-enconders.
First and second enconders work great. But from 3rd to 8th something strange happens.
At first sight, I thought it was a speed problem, they seemed to be incresing/decreasing slowly. But I continued testing with some speed parameters changed and I realized that speed was not the problem.
So, what happens? I really don't know. I think those enconders are sending values wrongly, so that's why it seems to increase/decrease not as smoothly as it shoud. Sometimes I move the encoder in order to increase the value and as it is increasing, it goes back a couple of values and then continue. It's weird, and I don;t know how to explain it better.
For example:  0,1,2,3,...,59,60,59,58,57,58,59,60,61,62...127. But I only move the encoder in order to increase, so this should not be happening. I repeat, with the first and second encoder, there are no problems.

It happens with every program, such as NI Traktor, Ableton Live, etc. And even if there is no program running.

I only have to add that i'm using the option of Bar in the leds output option, but as it's the same for 1st and 2nd encoder, I guess that's not the problem.

Anyone has some idea of what should be happening?

Thanks, and again, sorry for my english.

Pablo.