Election Commission is Responsible

 Detailed  Analysis

 People moved abroad.

But the voter ID is still there

Students studying abroad or out of city.

But the voter ID is still there

Laptop Full
Books

Duplicate votes. 

Sometimes it happens, reasons can be many.

But the voter ID is still there

People moved to a different house.

But created another voter id with their new address.

There is no easy mechanism to delete such votes by our self.

People relocated to other cities.

But the voter ID is still there

People died.

But the voter ID is still there

Fake Votes created wantedly.

Unable to find the booth

Trust me this issue is more in city

They wakes up in the last minute.

Lack of Voter slip.

There are people who thinks as they didn't receive the slip their vote is not there.

But this is not the fact and they didn't check online.

Not fixing these issues are also prone to the last hour rigging. This is the main reason in many places for the increasing of the polling %age in the last hour.

All these issues can be fixed by ECI if they are really serious.  Also, they need to ease the process of deletion / moving etc..