Oh, sorry for being a bit unclear. I mean by "how and why" is how do you place those bets on which casinos and why them? I am simply trying to understand your steps here, to understand what the provider said, not trying to put words "arbing" into your mouth. So, you opened several tabs of different casinos, with different providers, compare their odds and choose one or two amongst many casinos that opened altogether on those tabs, then you put bets on what you deemed fits you best? Or were it across devices?
I'll try to explain the best i can.
So let's say i have 4 tabs open in 4 different casinos, and i want to place a bet on a team. Let's say (just as an example) that my stake is 200 EUR. I will then place 50 euro on each one site. Like i said, spreading the eggs in many baskets. Odd's do not matter, and i am not picking which one is the best, whatever the is at, is what i bet. You asked if i used multiple devices to place my bets? If so, no. Always same device.
Ok, this might sounds like too much to ask, but I can't explain the reason why I ask for the time being. Dare I assume you also put your eggs on other baskets on the bets depicted on the screenshots? If you did, is it possible for you to help me understand the matter by showing me those baskets and its eggs? Uhh... I mean the screenshots of the exact bets of the same events in different casinos, to prove that only the one in BetPanda is cancelled.