I don't know. The 'rubberbanding' may mean that a given area might be flexible in leveling, being level 5-10 at one point when you go through there and 30+ the next time you are there only to snap back to a lower level even later ... hence the 'rubberbanding'. That way no area would be predictable and you might run into something horrid anywhere at any time.
"We call it rubberbanding; we'll have an area [where enemies scale from] level 5 to 10, and then this area will be level 30 and above,"
And then THIS area will be level 30 and above ... sounds to me like he's talking about the same area that was previously level 5-10, not a different area (which would have been THAT area, referring to another place).