I have an question about order of batch request refund? Why begining with batch 6? Batch 1 wait the most and batch reqest should begun from first batch not the last.
NO!
You are not thinking this through, and/or you didn't read the update carefully. Steamboat requesting the refund for the latest-ordered batch allows this group buy to maintain the earliest spots in Avalon's queue possible. Then the funds received from the refund will be distributed to those in the group buy who requested them, and all others move up in our queue.
Customers in a batch which has been refunded will be placed in an earlier batch according to their position in that batchs order, and their position relative to other batches. All purchases will be kept in their original order, and the order book truncated to reflect the refunded purchases.