NY does have a procuring cause rule - "ready, willing and able" the agent that brings a ready, willing and able buyer to view a home is due a commission. I think your question may have to do with any "allegiance" - the answer is "NO". You owe the showing agent no allegiance for anything, and he owes you none either. The only time there is an established relationship is with buyer's agency.
this practice is NOT common in NY fo rseveral reasons. nevertheless, You can go see that house with agent "A" - however, if you ever go back to that house to make an offer, you should not go back with agent "B"... as agent "A" showed you the home first and does have rights, but NONE that can harm you - only the 2nd agent.
So to be fair, most people in NYC work with a few agents, until they find one they like. Or they go to Open Houses without an agent and just ask questions of the listing agent.
I actually think I may know you matthew, so we can talk more this weekend.
Long staory short, you have nothing to worry about unless you sign a "buyer's agency" form - please note that in NYS we require an agency disclosure to be shown, do not confuse the disclosure with an agency agreement. The disclosure just states that you are aware whether the agent you are dealing with is representing the seller or you.
you can see the form and laws at the link below.