merchant map node

I came across a map node and went into it and found a merchant that sold uniques. I looked at them, and decided I was going to wait till I had a higher map, so I left w/o buying anything... not knowing that by closing that map it would auto consider it "completed" and I can't get back into it.

Is there anyway to get the node reset? Is there only one of them on the whole map?

They are rare random finds, so just have to wait till you find another

That sucks - but meh, it's EA ... live and learn ... ty much