I have been working in and out of SE Asia for years, and keeping tabs on entry dates and length of stays is a pain in the butt. Especially Thailand where they keep changing the rules. So - I create my own alerts based on my own travel plans and I get a notice when I need to do something. Also. Cna download my entire travel history - which is also really useful. Try reading backwards throigh your passport to figure out where you were and when. Nightmare!
I think this is just what I need to keep tabs on my Thailand Visa situation.