the ASF tutorial is a bit unpractical at some points (in my opinion).
About the export parameters: There is no right or wrong - they can be changed according to the needs and outcomes of each specific case. A good start are 10x10 tiles and an overlap of 200 pixels. If you encounter problems or bad quality, please check the last page of the Skywatch tutorial where potential error sources and solutions are provided.
However, none of these points are related to StaMPS, so this does not really fit in here. So it would be good to continue discussions on one of these topics: