National Highways Authority Of India [NHAI] — Charging extra toll amount from Fastag in Coimbatore bypass road stretch

On July 3rd, 2021, was traveling from Thrissur to Bangalore via Coimbatore, Salem.
Vehicle Number: KA05ML3244

While passing the Coimbatore bypass road, It charged an additional toll on two booths from the FastTag.

It normally charges 17/- from one booth and rs 28/- from another one, even though we pass through four toll booths in that stretch as it has more inter roads are connecting in between. But it has deducted toll amount from all four toll booths, which has to be re-validated by the NHAI

Coimbatore NH bypass is just an 18 km stretch with only a single lane available. However, it charges a good amount of Toll.

Here is my FastTag transaction details (Four times it charged)

Paid Rs 17.0 toll for KA05ML3244 at Madukkarai on 03 Jul 2021, 12:50 PM. TxnId: 0010012107031257296206.

Paid Rs 28.0 toll for KA05ML3244 at Pollachi Salem on 03 Jul 2021, 12:57 PM. TxnId: 0010012107031305450156.

Paid Rs 17.0 toll for KA05ML3244 at Pollachi Cochin on 03 Jul 2021, 12:55 PM. TxnId: 0010012107031310378417.

Paid Rs 28.0 toll for KA05ML3244 at Trichy Cochin on 03 Jul 2021, 01:10 PM. TxnId: 0010012107031318248693.

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Additional note:

When I had travelled from Bangalore to Kerala via the same road on April 3rd 2021, it charged only two times.