The 0.05 aren't fees. I think they were test sends to make sure the address and all else was ok. After a couple of confirms the remainder was sent to the confirmed address to bring it (usually) to a round 5k.
Doesn't explain why 5k when that wasn't the lot size.
Doesn't explain why 5k when that wasn't the lot size.
Maybe some bidders won several lots and that's how the buyers wanted them.




