Speaking of LNBF, make sure you guys tweak the skew AND focal point of the LNBF itself once the dish itself is aligned to the desired satellite. People often forget to adjust the skew (twist LNBF left or right on holder) or adjust the focal point (push LNBF in or out on holder). You will be surprised how much difference in signal strength this adjustment can make. Also, it is a good idea to check both horizontal and vertical channels when adjusting the skew as you need to find the "sweet spot" where both horizontal and vertical transponders come in the strongest.Rick, et al.
Did you guys mention the type of LNBF you're using with your small antennas?
A high quality LNBF can also make all the difference in the world. Especially if it's an older model, several years old. After your dish size (Antenna gain) & Alignment, your next shot for improvement would be the overall system Noise Figure Of your system, in which the LNBF would play an important role.
At least that's how I see it. Glad to hear you at least know it's functioning now.
I think that Claro Mux is a fairly new provider meant for Carribean? All Spanish stuff ya can tell that much.