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.
Let me correct myself.
First someone said here that the TLA reading limits A/THR maximum thrust for each engine even in speed mode
After the left Tl was brought to idle and then to reverse, you can see in the graphs a considerable EPR increase in the right engine. It leaves approach thrust and surpasses climb EPR (apparently).
Then EPR in the right engine starts to reduce again until it gets fixed at (I suppose) CLB power.
It looks like that in a first moment the A/THR is somehow trying to compensate reverse thrust in the left engine, surpassing CLB thrust in the right one.
Maybe this "anomalous" thrust in the right engine is just derived from a momentaneous difference between ACTUAL EPR and TARGET EPR.