Need help on MagicPin offer

I am new to Magicpin and wanted to buy Rs.5 Saffola voucher to get discount of Rs.650 on Rs.1300 bill. But When I am trying its asking me to pay Rs.172. So, I could not get the how is it working. why is it asking me to pay 172 instead 5.4?

I see below as coupon
[Img src=“https://imgur.com/x...FE”]
Get Rs.650 OFF on min bill of Rs.1300 (Valid on select products) ₹650 ₹535
Valid on: All Days . SAVE 99%
Gei it for ₹5.4

But after clicking on buy I see this
[img src=“https://imgur.com/e...7w”]
Get Rs.650 OFF on min bill of Rs.1300 (Valid on select products) ₹650 ₹535
Valid on: All Days . SAVE 99%

Order Summary
Get Rs.650 OFF on min bill of Rs.1300 (Valid on select products) ₹650 ₹535
₹535x 1 voucher(s) Save 99%
-————————————————————————————————————————————————————-

Total Amount ₹650
Discount on MRP – ₹115

Maximum possible savings : ₹644.6Your wallet balance : 363
You could have saved ₹167.1 more on this transaction.
Apply Coupon

To pay ₹172.5
Pay ₹172.5
You are saving ₹477.5 on this order