Hi there folks,

I am fairly new to betting, so need your help to demystify this issue I'm struggling with. While trying my hand on getting the free bet from Coral, I had placed the following bet with them:
Single To Win £100.00
Darlan - 3:30 Cheltenham - Best Price Guaranteed @ 1/3 (BPG - price applied 4/6)

To counter that, I had laid that bet on Betfair - the details of that trade is as follows:
GB Chelt 9th Dec / 15:30 2m1f Nov Hrd / Darlan
156 GB Chelt 9th Dec / 15:30 2m1f Nov Hrd / Darlan
Lay 1.55 5.00 Lost (2.75)
Lay 1.55 145.00 Lost (79.75)

According to my calculations, I should have made a profit of £84.17 (Coral winnings of £166.67, minus BF loss of £82.50), but I seem to have actually lost money on it. Maybe it is something pretty simple that I am overlooking, but this thing has got me completely baffled.

Any help with this will be greatly appreciated.

Thanks in advance for your help, & look forward to hear from you.

Cheers!
Mike