Interesting. On a multi-use paths, faster moving parties should always yield to slower moving parties. Doesn’t matter the type of transport.  The only rule of courtesy is to only occupy half the width, no matter the side. 

An interesting cultural difference I’ve noticed with North Americans - rights of way are co nsidered to be something to assert and to take, rather than to yield and to give.  The example is the cyclist in your situation. It’s the complete opposite in other parts of the worlds, where traffic doesn’t have any ‘rules’ - everyone just wants to get to their destination safely. 

 ohh this explains why it was surprising. i was looking out for other dogs and walkers, bikers weren’t on my radar at all. because they’re normally looking out for me!