I'm intending to visit Thailand in September, as a Czech republic citizen.

My plan is to go for 30 + 30 days extension then leave for 2-4 weeks and then return for another 30+30 days.

1. Is there any risk of not getting the extension during my second visit?

2. On some Czech websites I read that maximum limit to stay in Thailand is 90 days within any given 180 days period. Upon Googling and searching through Facebook groups I can't seem to verify this information anywhere. Hence asking here.

Thank you 🙏