This makes no sense to me. Payouts should be to the address of record. If there is no other address of record then it should be to the address used to buy shares in the first instance. These transactions can already be verified on the block chain. No other validation should be needed to satisfy fiduciary responsibility.
Actually, that's not how it worked. You had to fund a wallet run by Ukyo, and then transfer over offchain to bitfunder, then all bitfunder buys and sells were either offchain or coming out of a pooled addy and record keeping done by bitfunder... the bitfunder address the shares were tied to was independant of all this.... most you can prove on blockchain is what you sent to the wallet site, weexchange.
Anyway, we should be all good now, don't have to do 2 in 1 tx, it's a normal receive/send, just do 'em close... that web based rushwallet lets you bounce coin back out of it before confirms, so that might be handy for some.