I am mindful and accepting of the present moment.

Reading the same paragraph four times is not a failure of mindfulness. It is the thing itself — the noticing is the whole event, and the going back is the practice. Anyone who stays put on the first attempt was not doing anything difficult.

Attention wanders towards whatever is unfinished, which for an anxious mind is most things. It will keep going there. The instruction was never to stop it leaving. It was to come back, again, without a lecture about having left.