You can edit the list of inputs to match what your TV has.

The Harmony incorporates a rather conservative set of delays to prevent commands from interfering with one another. If your original remote is faster, this probably means that the Harmony's interkey delay can be reduced. The Harmony also repeats each command a set number of times to insure reliable reception. This too can also be released to get a better response time. Both of these can be adjusted from the Harmony home page through the Troubleshooting menus for your PVR. There is also a link to access the delay settings directly.