I will answer this to the best of my ability. If I am wrong please correct me, Sedo.
1) The seller does not have specific rights to declare an auction void. Once you agree to list it on auction, you are agreeing to specific terms beforehand, which include not being able to cancel an auction once it has begun and has a bid. If there is a serious error, it may be possible to relist the name, but the auction time cannot be extended, and I think that it would only be possible to cancel and relist something in he most extreme errors.
2) I don't know what they have planned in the future, but currently the only thing I know of that they do to punish people is to close your account down if you don't pay for a domain you won. I don't know about the .mobi auction. I have no specific insight into that situation, and can't give an answer for what they have planned. Also, please get more servers for the next auction.
My suggestions to Sedo, other than canceling people's accounts who don't pay, is to have either a more strict buyer approval process or require a deposit on large bids, or both. It is nice knowing that a non-payer will get banned from Sedo, but if they don't park much there, it is sort of an empty threat. If they do park a lot, than I am sure it won't be an issue with them
SedoPro pays the same as regular Sedo. That is net 45, meaning you don't get paid until after 45 days. Normally Sedo sends you an email on either the 10th or 11th from
parking@Sedo.com. The email is titled Sedo Domain Parking [Report December 2007] or whatever month. In this email they tell you your total earnings for the month, and the date you will be paid by. Mine always says "The total amount will be transferred to you via
direct deposit or wire transfer by the 15th of this month."
If you take another form of Payment, such as check, it takes a little bit longer.