Usha describes somehow overpowering her boyfriend and managing to push him over the edge of the bridge. But in the flashback it's clear that the boyfriend was standing on the ledge outside of the bridge's railing when he fell.
In Vedic Astrology there are 9 planets but when Usha calls a Panditji to verify Sandeep's Janam Kundli/Horoscope , only 7 planets can be seen, two major planets are missing from his Birth Chart. A clear Production Mistake.
In a flashback scene set some 30 years back, there can clearly be seen contemporary vehicles.