Handles the alien tail XOR blit when JonesPos&7 >= 4 (sprite straddles the next character row). Uses SLA/RL chains for a left-shift instead of SRL/RR, mirroring the logic of BlitJonesFrame's right-shift section. The shift amount (pixels left past the half-character boundary) is patched into the self-modifying JR at the JR at BlitJonesShiftCode2, then 21 rows of 4 bytes are XOR-blitted.