The system OCR is known to override and misread the passport data page data, so you must ensure that everything on your bio data page matches your passport, triple check everything before you submit
Thai is fine. Upload the bank statement with 500k by itself, sounds like the resolution is poor when combined with other documents. Highlight your name the amount and the account number
Manila seems to be fine with a final balance, BUT, they want to see a 3 month statement. So if you've had only 50 pesos for the last little while and they suddenly see a million, they might wonder what lottery numbers you played.
You apply where you are physically present except for Thailand. For many people already in Thailand they go to a nearby country and apply instead of heading all the way back home to Timbuktu.