I have a question regarding the "Betting" section on the site.

I understand its a tote/pool/parimutuel system but there appears to be some inconsistent outcomes with the final odds and margins.

For example, in the Levante V Valladolid soccer match on 31 Aug, the final odds were:

Levante 1.73
Draw 2.01
Valladolid 2.41

The "over round" or "vig" on this market is a whopping 149! (A pure fair odds market will equal exactly 100)

However, in the Villareal V Real Madrid match the next day, the final odds were:

Villareal 3.35
Draw 3.59
Real Madrid 1.47

The margin on these odds is about 126 (still a very healthy margin but considerably better for the gambler then the Levante match.)

Its not my place to question Freebitco.in on how to run their business but the difference in profit margins from one event to the next does appear erratic. Its as if the site is taking widely different cuts from each individual event instead of say a flat 15% for example.

Does anyone know whats behind this? Rounding errors for example wouldnt explain these differences. Am I missing something?

Thanks in advance to anyone who can offer any explanation.

(For the avoidance of doubt Im not accusing or hinting at any underhand practices by the site at all, Im genuinely puzzled.)