[Uhhrrr]

It's an artifact of the posting guideline:

> If the title contains a gratuitous number or number + adjective, we'd appreciate it if you'd crop it. E.g. translate "10 Ways To Do X" to "How To Do X," and "14 Amazing Ys" to "Ys." Exception: when the number is meaningful, e.g. "The 5 Platonic Solids."

It probably really should have been just "Bugs in the way founders are wired as they move from seed to Series A". Still a little hard to parse (But the actual article was good I thought, and resonated with my experience!).