If that's a dig at me I wasn't saying Sheila washed up after the massacre. I was thinking she may have washed up earlier in the evening. Two people washing up one who was visiting. Stuff gets moved.
Sheila washing up before the massacre, the sink tidy & fairy liquid will still be put back in there usual places.
As the housekeeper said, Nevill & June always put things back where they came (rifles included ?) & she had never seen the sink tidy in a different location.