What should I expect when arriving in Thailand with a one-year multi-entry type O e-visa letter?

I just received my approved 1 year multi-entry type O e-visa letter.

I assume I am to offer this letter up to the Thai Immigration Officer at the airport upon arrival.

Questions:

1). Then, will the Thai Immigration Officer put a corresponding stamp with the expiration date in my passport?

2). If I leave Thailand and reenter before the expiration date, will Thai Immigration note the increase in the expiration date in my passport? That is, the expiration date on this type of visa still increases to one year beyond the last date of entry, doesn't it?

Thanks