National Highways Authority Of India [NHAI] — Excess fare through FASTAG

Address: 166, Near Sukreswar Temple, Panbazar

Dear Sir/Madam,
I am a resident of Guwahati. But whenever I traveled through Madanpur toll gate, each journey deduts Rs.105 from my fastag, whereas the one side fare is only 55 (by cash).
Please reply, why double the amount is getting deducted from fastag.
Few transaction IDs
751606152421297594449P - 23/11/2020 (10:57:01PM)
761604119119372112147P - 31/10/2020 (10:08:44PM)
701598583570804497639P - 28/08/2020 (08:29:31AM)

Regards
Arnab
Mobile - [protected]