I dropped my player on Sunday night for Monday's games, and it removed his score from my lineup for the current week, literally causing me to lose. With his points, I had won the week.

I did this via the app, and there was no warning message, etc telling me I'd lose his points for that week. He didn't play on Sunday and all the remaining games were done for the week, so I was picking up a replacement for Monday's games only.

This seems like a glitch to me, as you should definitely not lose points for that week if the player has completed all his games for the week, and all other games were either started or finished, so you can't benefit from swapping in a guy. Here is the link to my team, where I dropped Ryan Rollins after he'd played in my lineup every day of the week: https://basketball.fantasysports.yahoo.com/nba/267854/5

There should absolutely be a warning message saying that you'll lose points for that player even if they've finished all their games and if all the games in the NBA are done for the day. That's a very brutal way to lose when there's nothing telling you otherwise.

Thanks
Adam