Well then, every single $1, $2 and $20 note from the multicoloured series (that means over 8.1 billion notes) shows this "bra strap". It is NOT a bra strap, as nearly any woman should be able to confirm, but merely a fold of fabric in the Queen's dress.
Sorry, but the notes you have are perfectly normal.
Logged
BWJM, F.O.N.A.
Life Member of CPMS, RCNA, ONA, ANA, IBNS, WCS.
President, IBNS Ontario Chapter.
Treasurer, Waterloo Coin Society.
Show Chair, Cambridge Coin Show.
Fellow of the Ontario Numismatic Association.