Sounds like your mixing up your visa is valid dates with you actually entry stamp. I'll assume its a tourist visa, which is valid for 90 days, meaning tou have to enter withing that time frame. You then get stamped in for 60 days which be extended 1 time for an additional 30 days.
immigration hasn't changed any seasoning rules. Bangkok Bank have changed their rules in relation to the banked money, as in freezing that sum for an additional amount of time. Rumour has if that it is to prevent agents lodging the funds to 'meet' requirements then withdrawing it again