Did you get an extension of stay for twelve months, is that what you mean.
Your letter of income would still be valid, they are good for six months. My understanding is Australia is one of the four embassies that no longer gives out letters of income, so you will have to plan for next year. Either ฿800,000 in a Thai Bank, or ฿65,000 deposited into your Thai Bank every month, not an average, but ฿65,000 every month.
yes it is. Twice now I have reported 14 days before my reporting date, once it refused me, I mailed it in and that was excepted. I just did it this month, and it says pending. On my due date I mailed it in, with a copy of the registration number they give you. We shall see what happens, but for me online sucks, mail though has always worked okay.