Diacritic
This took quite a bit of searching.

These numbers are not related to the footpath at all, but are in fact beach marker numbers. Beach markers are yellow pyramid looking things on the tops of steel poles across the coasts.

The edit that introduced the "33" also introduced a large amount up and down the coast here. 100129680

I can't work out how to obtain this data in a license-compatible way, but these numbers should be removed from the steps/paths and placed on a node where the pole is.