Sorry Tod, I know you closed the comments on an earlier post of this story but I think it's important to acknowledge "recently" embassies and consular affairs were given access to immigration systems- thus now when applying for Visas using new passport to hide previous history of travel will not work - they can now see everything!
TLDR : Answer Summary
Recent changes have allowed embassies and consular services to access Thailand's immigration system, making it impossible for individuals to hide their previous travel history by simply obtaining a new passport. This move emphasizes the importance for expats to maintain legal compliance during their stay in Thailand.