double close/simultaneous close A-C run into one another

[Mike O.]

has anyone been in the double closing/simulateous close related to a whole sale in which the seller from the A-B transaction runs into the buyer of the B-C (A-C)transaction or how to avoid those two running into each other at close or should a wholesaler just be upfront and tell both of them what is going on? i will be going to a closing and due to a last minute scheduling change both transactions will take place at same time... what if Party A runs into party C and they are able to figure the spread on the wholesale?