Shoepie: Updating your pool team is this week only so relax, you haven't missed anything. I like to give people a chance to update their team midway in case they lost some of their picks early on. It gives them incentive to stay interested in the pool. It's easier for me to make all changes at once than to allow people to change their pool at anytime. I was reminded of that the hard way recently by allowing people in the Amazing Race pool to make changes at any time. Whew, makes it tough to keep the scoresheet up to date!
You aren't required to make any changes so if you're happy with your team, you can leave them as they are.
There's no cost or penalty to make changes, since you're only given a limited amount of time to make changes. And you can't replace your whole team.
I hope all that is clear. If anyone has any further questions, feel free to send me a private message. I might be able to explain it better there.