No and no. Using whatever's the latest stable release of Channels and Home Theater Master MX-500 Universal IR remotes.
The problem with the remotes isn't all the Channels app's fault. At least I don't think so. The Apple TV learns remotes by pressing and holding remotes' buttons until it learns repeated commands. Problem is: You press one of the directional buttons just a hair too long and the Apple TV receives, and apparently passes on the the app, multiple presses.
This means, for example, if you press the right button to FF, Channels can interpret it as double-pressing (or more), and does its chapter skip thing. Annoying when you're trying to manually skip though a commercial because Channels DVR has mis-marked the commercial break. (Which it does a lot.)
The stupid on-screen "comm skip" thing at the end of a program segment is an acknowledged bug that remains unfixed. I suppose because they're too busy working on the new version to dedicate time to fixing it.
The point is that none of these annoyances existed with the Fire TV, using the same remotes and a Flirc USB IR receiver. In fact: The only regular annoyance with suffered with the Fire TVs was they'd occasionally go to sleep and refuse to wake up. Oh, and we could almost count on the Netflix app to lose contact with Netflix' servers at least once each evening. But those were occasional annoyances. Channels on the Apple TV is nearly constantly annoying.