It's just that some days I get behind and it takes several days to catch up during which I can't hit that button or I'll lose the nodes I haven't seen yet.

Even if you don't look at the site for a few days, the nodes you haven't seen aren't lost for ever: there's an input on Newest Nodes to set how many days back you want to list the nodes. (It's however limited to max 8 or 14 days I don't know which one.)

Update: I see that it's also skipping the list of notes if you're querying more than a few days.