just going by my invoice evo purchase
Not saying you aren't potentially correct but as a developer I NEVER start off an auto incremented user visible numbering system at anything close to 1. Currently I start them out at 1250. Experience has shown me that users don't trust auto-numbered systems with a low running increment value. There is little user understanding that in modern development practices most of the testing goes on in a dedicated systems to not pollute the production system. They see something starting around 50-100 and think it's untested.