Release Preview to Beta not working

June 29 - Clean install using Release Preview 22621 ISO
June 30 - WU update to 22621.169
July 12 - WU update to 22621.232 failed (see my other posts about this)

July 13 - UUP Dump ISO used to install 22621.232. Got an error when switching to Beta and tried to install 22622.436.
July 20 - Used MS ISO to repair install, back to 22621.105. Updated to 22621.232 through Windows Update. Again Beta update wouldn't install.
July 29 - Windows Update to 22621.317 installed without issues
Aug 9 - Windows Update to 22621.382 installed without issues. Switched to Beta this morning - 22622.575 won't install (error 8007002).

WU worked for me with no problem. But I update only via WU.