Not quite, flyingnewbie10,
The TL was in the CLIMB detent, which is at the top end of the A/THR active zone of travel. SPEED mode kept that engine's thrust at approach thrust, not climb. If the engines were at climb thrust the aircraft would likely have sailed straight over the runway.
If I understand this right:
While A/THR was still connected, the thrust of the right engine crept up to balance the reduction in thrust from the left, which is normal for SPEED mode. When the A/THR disconnected, the actual engine thrust remained where it was at disconnect and did not change until impact.