I don't know if its a blooper but SP producers have used the same spot and building in two different situation.
First was when Nahar goes to see Saloni when she is in the hospital and crashes into Yug. He shown outside getting out of the car with flowers and you can see in the background stairs leading upto a building and sign posted saying city hospital.
Then, when Yug comes to meet Nahar and the security guy asks him to wait outside. Neels comes and Yug seeing him runs up the stairs. Its the same stairs leading up the building. The only diference is that sign is changed to Singh (singh was written in bold letters...i am probably guessing its Singh inc.)
Same building and same outdoor location.
Another famous location is the Mandir..