Yes, normal. These things don't have an automatic choke that will richen things for you while cold, then go to normal as full operating temp is reached. You start out cold a little lean, but it comes into range as the engine warms.

It is also a sign that you don't want to try running it any leaner than you are. Many will run them a little richer than where you are at, as it makes for a little better manners when it comes to starting, and provides a reliable idle (without quitting).

Your call. You can keep it on the edge of lean as you are, or let it run a little sloppy (rich).

Proper input voltage depends totally on the ign module you're running. If it's the newer 8.4v, you absolutely don't need to do anything to run direct from an LiFe. Even if it's the earlier module, many are running those direct as well (without issue).

Bottom line, glad to hear you're happy with the way it's running! -Al