Mr/Ms. No, no, no, please see the following:
https://lottery.dcps.dc.gov/pdf/Final%202013-2014_Post%20Lottery%20FAQ.pdf
"For the dual?language/Spanish immersion programs at Oyster?Adams, Bancroft, Bruce?Monroe, Cleveland,
Powell, Marie Reed, Tyler, preferences #2 [PS/PK IB w/o sibling] and #3 [PS/PM OOB w/sibling] above are reversed in order to support the programs' language acquisition goals."
That is to say, at Bancroft and other dual-language schools, out-of-boundary with sibling gets in before inbound without sibling.