id field not incrementing

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Each new record seems to stick on a specific number (in my case 8).
When new sign up occurs it reuses the number 8..deletes the previous.

Looking at database structure the ‘id’ field IS designated as the PRIMARY KEY

– int(3)
– NO NULLS
– AUTO_INCREMENT

I suspect this started when Participants Database Email Expansion Kit was installed.

Any insight or directives would be appreciated.