Fencer: Here ya go: Game 1: Go (Ceiter vs. ikkentobi) - on my screen this game has A1 in the upper right corner. The resulting BK-SGF is vertically mirrored.
Game 2: Go (ikkentobi vs. stiveletti) - This is an iteresting example. First of all this one throughs an error "Invalid board location "pass" on line 134". Pass should be an empty node like ;B[] or a tt like ;B[tt]. Back to the coordinates. In this game A1 is on my screen at the lower left corner which is right. But the resulting BK-SGF is horizontal mirrored.
FYI: All SGF-editors that I know have A1 at the lower left corner! The SGF notation has [aa] at the upper left corner (see http://www.red-bean.com/sgf/go.html)
That means a black move shown by a SGF-editor at A1 should be written ;B[as]