Managing Email Address Waterfall & Viewing Verified Emails: DropContact API Optimization, ZeroBounce Column Data Access

1 - When doing a waterfall of multiple providers to find email addresses, is there a way to set it so that it only checks the second provider if the first provider fails to find an email? I have an API for Drop contact and set it as the first provider, but when testing the first 10 rows 20 credits are used as clay checks Drop contact first - but then also checks the other providers even if drop contact finds an email. 2 - How can I see the validated email column data from Zero bounce? (it's there but not showing any results). Thanks in advance 🙂