Hi everyone,

I’m working on a volunteer signup flow using SignUpGenius, Google Sheets, and Zapier Paths.

What I’m trying to do:

• Volunteers sign up through SignUpGenius
• I use Zapier to:
  • Lookup the correct row in Google Sheets (matching on a helper column: Date+Area)
  • Place the volunteer’s name into the next available Walker slot 
  • I use Zapier Paths  to check which Walker column is empty, and fill it accordingly

My path logic looks like this (example for Path B2):

• Role = Walker
• Walker 1 → EXISTS
• Walker 2 → DOES NOT EXIST
• → Update Row → Walker 2

The issue:

Even though Walker 1  is already filled, Zapier still overwrites it when a new walker signs up. It seems like the condition is not properly detecting that Column Walker 1 has content.

I’ve tried:

• Refreshing the test row in the Lookup step
• Using "Text contains" and "Text does not contain" with a value like n/a
• In testing each path it works fine, but testing it with real data it does not. 

But the overwrite still happens.

Has anyone run into this?

Is there a better way to detect if a cell in the lookup row is truly empty before updating it?

Or a more reliable setup to ensure only the first available Walker slot is filled?

Any ideas, scripts, or Zap logic suggestions would be much appreciated.

Thanks!