Mmmm, I'd still suggest playing around with gain and fine-tuning. Certain codes might be more prone to overloading than others.

Also, as odd as it sounds, I *have* experienced issues with certain codes going through RF. For example, I have an MCE system that works very poorly through URC RF - if you tap the button, the MCE senses like 2 or 3 button pushes. It's fine via direct IR, and isn't an issue with the exact same codes on another MCE system I have.

The only solution was to disable repeats and select a very specific number of iterations. Now it's actually possible to navigate, but it's still awkward as holding down a key is no longer possible.