Gurbani, who carded an even par 70 on first day, managed only a three-over 73, but Amandeep Drall, her closest rival after the first day, slipped down to 76 and the third place.
In between Aditi Ashok, leader on the Order of Merit, stayed consistent by adding 72 to her first round 74 and moved to second place. Gurbani has a total of 143, Aditi is at 146 and Amandeep, winner of the Usha Eastern India Ladies golf, at 147.
Gusimar Badwal (74-77) was fourth at 151, while Gauri Monga (76-76) was lying fifth, and Seher Atwal and Ridhima Dilawari shared the six spot.
Gurbani, who had one bogey on fifth, was going fine till the 16th tee. Then on 16th and 17th, she dropped one shot each and ended at 73. Aditi had three birdies on second, fourth and seventh, but she also dropped three bogeys and one double bogey on ninth.
Gurbani led the overall field and also Category A at 143, where Vrishali Sinha (80-75) at 155 was a distant second. Aditi was on top in Category B at 146 with Seher Atwal (75-78) at 153 in second place.
In Category C, Sifat Sagoo (81-88) continued to lead but at 169 she was now only one shot ahead of Arushi Pandey (84-86), who narrowed the overnight gap by two shots.
In Category D, Tanishka Kumar (79-79) was way ahead at 158 with Vasundhara Tihara (86-86) in second place at 172.