No, 90-day reports do nothing to the duration of the stay allowed - it's 180 days max, no matter what. You just went to the imm a bit too early, so you'll need to do two 90-day reports instead of just one
not true. I wouldn’t try it myself, but I know for sure people successfully submitted statements from two bank accounts for retirement and guardian visa extensions
my point was that bureaucracy sucks everywhere, and Thai visa application process is not that bad if you compare it to European countries you come from