@Darnell *******
, you need to understand there are two different things people are talking about.
One is when you border-bounce <- go to a border, stamp out of thailand, stamp in&out of another country and then stamp back into thailand. As long as you are doing that prior to the "enter before" date on the VISA itself you will be stamped in for 60 days
The other one is the extension of stay that you can get on each 60 day entry at the immigration office for 1900baht IF you want to. That will be for 30 days.