UPDATE:

I've found the problem.

1. Regarding the IROUT and IRAMP failures, apparently that is a common response to programming the MX850 remote but it nothing to be concerned about.

2. Regarding the number keys not responding to commands. Apparently even though I got the "GOOD" response after learning the code, the GOOD wasn't good at all. I had to learn the codes a few times before it actually worked. I think the original remote batteries weren't as charged as it would've been needed to be.


All is well now!!!