'Return' values are subject to maximum payouts as detailed in our rules.

[Puntermk]

I did not know where to ask so I will try here. I would like to ask someone to tell me  WTF is the following message  'Return' values are subject to maximum payouts as detailed in our rules,. I usually use flat bet, today I had a bet at bet365 and when i checked my balance it was not what I was expecting. I checked history of my bet and I noticed that my stake was not the original that I bet, the stake was 1/4 lower, and off course my win was lower. Under that i saw this message  'Return' values are subject to maximum payouts as detailed in our rules,. I would like to ask if any of you had this experience, what is this exactly, does it mean that in other words that they limit my stake or what. I do not see other way,never happen before, the bet was not from some league where max bet is small or something similar, it was from English championship where i bet  on regular basis.