There are over 400 variables that go into the Klout score. While you might see an increase in certain factors such as retweets, likes, or people in your network, there might be other factors that are offsetting this gain. For example, engagement on your Facebook might be changing at the same time resulting in a net decrease in score. Your score is based off of rolling 90-day window and as we start measuring new data, old data past 90 days old drops off of your score. Be sure to check out your score history graphs daily for changes.
Note: It's normal to experience score fluctuations when adding and removing networks. Your score should be back to normal after a few days of doing so.