I sold my Chometz with dinonline. I am keeping two days Pesach even though I am in Israel. Can you make sure that rabbi Fleishman doesn’t buy back my chometz when it is still Pesach for me?
There is no need to worry. Part of the contract is that each person acquires his chometz back only after Yom Tov is over for him. Therefore you will not acquire your chometz back until after you second day. As a side point for those in Chutz La’aretz it is even later then it is for you.
Have a good Yom Tov