I believe I may have misinterpreted these two portions.
I grouped them together, thinking games can only be resold once. I really should of looked at them independently. The first part says nothing about games being sold only once. In fact, it looks like games can always be resold. And for the second part, it says "each game can only be given once." Looking at that independently, it looks like you can only give your game away once. It says nothing about your friend being unable to give/sell the game. I think that second part needs to be made more clear because it can be interpreted in two different ways.
How Games Licensing Works on Xbox One
Trade-in and resell your disc-based games: Today, some gamers choose to sell their old disc-based games back for cash and credit. We designed Xbox One so game publishers can enable you to trade in your games at participating retailers. Microsoft does not charge a platform fee to retailers, publishers, or consumers for enabling transfer of these games.
Give your games to friends: Xbox One is designed so game publishers can enable you to give your disc-based games to your friends. There are no fees charged as part of these transfers. There are two requirements: you can only give them to people who have been on your friends list for at least 30 days and each game can only be given once.
I grouped them together, thinking games can only be resold once. I really should of looked at them independently. The first part says nothing about games being sold only once. In fact, it looks like games can always be resold. And for the second part, it says "each game can only be given once." Looking at that independently, it looks like you can only give your game away once. It says nothing about your friend being unable to give/sell the game. I think that second part needs to be made more clear because it can be interpreted in two different ways.