Hi,

According to their official brochure, "The sliding round shall be based on the preferences already entered by the candidates in the online counselling system on the basis of merit of CET of the candidates. "

So, I don't think choice filling will be allowed again.

You can check more details here->http://www.ipu.ac.in/Pubinfo2019/Admission2019mian/adm2019brochures/2019A220319.pdf