The timelines are all messed up now. What's the difference between 'early' and 'pre' beta? Are these still later than the $500 'absolute earliest user testing

The timelines are all messed up now. What's the difference between 'early' and 'pre' beta? Are these still later than the $500 'absolute earliest user testing' pledge? If licences are now down to $15 - shouldn't all the pledges that contained multiple licences be adjusted as well? e.g., the $500 pledge included $200 worth of licences before, but now they are only valued at $60. I understand KickStarter doesn't allow you to change existing rewards, but this is turning into a bit of a confusing mess...