Other fantasy gameplay: I have a player who also plays in another position for some matches. Can he be used in another position>

Players are allocated only their primary positions within the game and can only be selected for these positions. For example, Pat Lambie most frequently plays at flyhalf, but depending on the circumstances he may occasionally play at fullback as well. You can only select him in your squad at flyhalf as this is his primary position. No other player positions will be included during the season as this may potentially open a loophole for users to benefit from unfairly.