Rule 7.08e reinstated force play

[rbmartin]

I was wanting some clarification regarding the part of rule 7.08e which states "However, if the forced runner, after touching the next base, retreats for any reason towards the base he had last occupied, the force play is reinstated, and he can again be put out if the defense tags the base to which he is forced;"

Here is the situation: Runner on first, one out. Batter bunts and beats out the throw to first. R1 rounds 2b. As F3 throws to F6, R1 slides back into 2b but overslides it (unintentionally)(to the 1st base side of 2b). F6 steps on 2b before R1 retouches 2b, but does not tag the runner.
Is the runner out via rule 7.08e?

Thanks