Random Patches in Map

Please have a look at these pictures below.
I have been editing this region of the map extensively for a past few days but suddenly it is showing some random patches on the map.

https://drive.google.com/folderview?id=0B9Qz9sR8X05pfjRDSVhHS3hIczVfNFRaQlpIQlpqUHNBUHRHc3ZyZXpOZVpGWXpZU2NwNzg&usp=sharing

Can anyone please help me get rid of this?
https://www.openstreetmap.org/#map=17/28.54449/77.19099
The location is IIT Delhi, New Delhi, India.

Thanks.

cross posted: answered at the help site
https://help.openstreetmap.org/questions/44007/random-patches-in-map-can-anyone-explain-why-this-issue