Do you know what your baseline is when everything is off - so all the lights / tv etc are off / on standby?
I thought ours was low at 0.3kwph but when I work that out over 24 hours its already 6kwph + without switching anything on. So that includes house alarm, fridge, freezers (x 2), things left on standby etc.
I might try switching everything off standby and measuring again.
I just wondered what others were?