Ahh! I see! Well, that removes the danger of missinterpretation at the cost of increased bandwidth as you say.
Sampling only a couple of times a second means that the bandwidth wont be a problem in and of itself, however, we are running the PIC controller on at a very low clock rate (32.kHz) and thus it might be an issue that we don't have enough overhead to do the other processing. I'll keep it in mind though. (We run the PIC at such low frequencies because every milli-watt of power matters in our application. If we have any overhead time, we will sleep it too, to reduce the power-consumption even further.)
