Turn off `appendOnly` to avoid sorted search error
Turn off `appendOnly` to avoid sorted search error

- finally tracked down the cause of this sorted search error that would sometimes happen; does seem to be with data indeed, but only when `appendOnly` is set
- I put some more info here, and runnable node script to reproduce it: https://github.com/fergiemcdowall/search-index/issues/414#issuecomment-329672969
- I will see what upstream says; may be bug or may be expected behaviour

WorldBrain/WebMemex,WorldBrain/WebMemex