Is the audience in JKK Biased?

After watching yesterday's episode i was really really angry. The audience there voted for their favourite, Shweta.

In Bolo To Jaane, Rupalli and Vijay performed really well, they were THE BEST in all 3 and they got less marks.

Shama and Rizwan performed good too but Shewta and Nidhan were not so good.

Audience there voted for Shweta and Nidhan highest, why??? Are they biased towards their favourite star???

Rupalii and Vijay danced really well, their corgeography was perfect and their steps matched too, why did they get 7??? and Shweta and Nidhan they got 8, when their corgeography and dance steps were not matching.😕

I'm not attacking any actor or anything like this, I personally don't like Rupali becuase of the character she played in Sanjivavni, Doctor Simran, and havent seen any of Shama's seirals/work so far. So don't think i'm being biased towards my favourite