When the Quarter Quell is being announced, we see Katniss, Prim and her mother on the couch from afar. Her mother has her legs crossed and is shaking them, but in the next shot her legs are apart and still. Also, Prim was seen petting her cat but is not in the next shot.
Why did Peeta paint Rue's picture and Katniss hang a dummy for the Gamemakers?
Peeta painted Rue's picture to hold the Gamemakers responsible for her death. Seneca Crane was the previous Head Gamemaker, who was executed for allowing two victors. Katniss painted his name on a dummy and hanged it to warn them that they're not safe and the same thing could easily happen to them.
She also wanted to show them up.
Is there anything after the credits?
No, there is no scene after the credits.
What is the logo shown before the credits?
It's the Hunger Games logo, which changes into the Catching Fire logo and finally into the Mockingjay Part 1 logo.