Kala is doing whitewash on Parmar's room. The wall portion which he is doing white wash on is white, in the next shot, it has a brown spot.
Kala picks up Chiku from the airport which is on the West side of Khalsa College. He is seen driving on the wrong side of the road (right side) with Khalsa College in the background and driving again towards West (to the Airport side). In the next shot, he is entering Hall Gate, which is in the opposite direction (East side) of Khalsa College.