The purported RO jump from 1.5 - 2.0 to ten times that looked suspicious to me too. I'd expect an easy doubling or trebling of RO from person to person transmissions once there are a material number of infections in a major urban area, but it will then take weeks for fomites to result in further doubling or trebling on top of that.
The simplest answer here is a misplaced decimal point in transcription.