When the user favorites a tweet which has 0 favorites, it increases the count to 2

[sunshine19090]

I couldn't get the exact steps. But this is what I noticed about the favorites functionality in the timeline.

1. User 1 creates 4 new tweets. User 2 follows User 1
2. Now User 2 favorites the first tweet, working as expected.
3. Favorites the second tweet, works as expected
4. Favorites the third tweet, increases the count to 2 instead of 1
5. Favorites the fourth tweet, works as expected.
6. Unfavorites the first tweet, works as expected.
7. Unfavorites the first tweet, increase the count to 1 for the first tweet and the second tweet but the color turns grey.