The reason the alpha testers will sometimes have different versions than the paying customers is because we want customers to have a build that has reasonable stability ensured. The alpha testers have signed up for a bit of punishment, the paying customers not necessarily so.
The alpha testers are sort of the "first line of defense" - they'll hammer on a release for a little while making sure there are no glaring issues, then once a build comes along that seems good and stable, that is made available to the registered users. Without this process you guys would be subject to a lot more uncertainty, instability, and other issues. Granted the current Technology Preview build you have available has plenty of its own stability issues, but there's no sense updating until they're sorted out. An update should be available fairly soon which addresses many of the most significant issues.
- Oshyan