Why is Google Forms frustrating for signup sheets?
Google Forms is a general survey tool, so it has no built-in concept of limited spots: it can't cap an option, close it when full, run a waitlist, or prevent double-booking. A purpose-built signup tool handles all of that automatically.
Likely causes and how to fix them
You need a spot to close once it's full
Use a signup tool with per-option capacity that closes automatically. Google Forms keeps accepting answers regardless.
You want a waitlist when something fills
Grasshopper queues latecomers and can auto-fill openings; Forms has no waitlist.
You need to stop duplicate or overlapping signups
Require unique emails and prevent time conflicts, which Forms doesn't do natively.
Capacity, waitlists, reminders, and conflict prevention that a general survey form can't do. Try a purpose-built signup tool
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Disclaimer: Google Forms is a trademark of Google LLC. Grasshopper Signup is not affiliated with, associated with, or endorsed by Google.