Hope these will work for you avzThe "1" seems to be compulsory if you want to be on the Beta update channel. The only way to get rid of it is to leave the Beta channel altogether. Apple makes it a point to remind you that Mojave is the past and Catalina is the future.
@TimothyR734 Any chance you can upload those IOUSBFamily.kext and IOUSBHostFamily.kext from the 10.14.6 Beta 3?