Why is Dara upset at SBS Gayo Daejun?

Dara reveals her disappointment and frustration through a tweet today. She expressed that she should've cheer for her brothers performance at last night's SBS Gayo Daejun.What happened?

She tweeted,

"I worked hard to make an electronic display placecard for the first time for yesterday’s SBS Gayo Daejun.I was going to work hard to cheer waiting with an anxious heart for Chundoong’s stage butㅠㅠA..d-different page came out..This kind of mental breakdown is a firstㅠㅠUpset upset..It was this originally…" (Trans by: Holly@AbsoluteMBLAQ.net)

She looks sad on her picture. That's so sweet, isn't?

Source: Dara's twitter
Written by KYUriShana@dkpopnews.net