Not quite the same script.
The main point of start is here: http://blockchain.info/address/13H7si7r2VsoaDcESxZnweH18H939ndgZL
There begins a chain of 5000 BTC and 3762 BTC.
The latter ends at: http://blockchain.info/address/12rebn6xb2VJt5YfMokUJvV4msdr7KohfG with amount of 1,058.54 BTC
It was used today to the 1000 BTC chain with duplicates of part of the payments from 3762 BTC chain, but in different order.

Sometimes the same address was used for supposedly different accounts,
for instance: http://blockchain.info/address/19mvuvS2VgCWDtfGpsLnJAPhBp2ZcWM3xQ
(two of its payments, 139+ and 421+ BTC, are not duplicated, but one, 55+ BTC, is).

BTW: Bitcoin was meant to be anonymous.