We've ASKED that non-JP-1 questions NOT be posted at JP-1. To be fair, we also asked that JP-1 questions not be posted here. You've got a JP-1 remote, and cable and ran into a JP-1 limitation, therefore your post is certainly JP-1 related. The error here was double posting (touching all bases?) Any further clarification about this should be directed to Jason at JP-1, as John suggested. I've never seen (recognized) that he frequents this site, so it's likely in vain to direct something to him here rather than at JP-1. Fact is, I think he seldom frequents JP-1 so you may actually be better to try and email him direct, if that's possible. good luck, fwiw, I think you have a good shot with one of his extenders.
Jim