Manisha was cursed for her dialogue - me mahila hone ke baad bhi niche soungi' - and it was right. However, Preetam sentence - hum kya chudiya pehneke beth jaye' - was gender insensitive. It means women can not do anything. In fact by Sargun that sentence was praised. And on top of it she used work bechari' because Manisha was sleeping on carpet - and Manisha cleverly pointed out. In defence, Salman and Shargun said it was in flow of saying something (it does not have literal meaning). So when Manisha says something you have right to blame, but when it is done by others - no problem.
Moreover, both Gauhar (though she was my favorite in last season) Sargun targeted Manisha, and I think it was because Salman could not do her anything in previous day. In fact, Sallman said something like you can never be wrong' generally, without talking about the facts.
In the case of Diangra and Sonali fight, firstly it was both's fault (at least my perception). However, Sonali was not told anything and the issue was khechoed' like anything in both the episodes. About taking sides - the only reason earlier contestants supported Karishma was that there were no groups that time, while this time it was groups.
In fact because of these biases, I am developing sympathy for both Diandra and Manisha, and although I like P2Gs, feeling favoured by Salman and other BB team.