The Norweigan scored the only goal of the game as Eddie Howe's side squeezed past the 'Seagulls' in extra-time to make it two wins against the same opposition in five days after Bournemouth recorded their first points of the new Premier League season by beating Chirs Hughton's side 2-1 on Friday.
Kind admits that Bournemouth have not started the campaign as they would have liked but says that with a tough game against Everton coming up at the weekend, there must be signs of improvement.
"We started the season badly, by our standards, but we know where we need to be," he said after the game.
"Even though we won on Friday, we know we can do better. We've got a tough game on Saturday against Everton and we have to be up for it.
"We showed against Manchester City (in a 2-1 defeat) how good we can be, so we just need to focus and work hard.
"But it's good to get off the mark. Tuesday was my first goal of the season and one that you're always looking to get.
"The fact that it was one that really helped the team was pleasing."