Ahh ... I can see what you mean, but I am not faulting her for Oreki's sloppiness per se.
I am faulting her for utilizing Oreki in a way that to me seemed to be functional first, that is, seeing him as a tool to achieve her own ends.
And the sloppiness of thought that is uncharacteristic of Oreki I see as a possible manifestation of putting the accomplishment of her own goals as her primary goal as opposed to Oreki's emotional and growth and maturity.
But I have a feeling I am kinda in
mode on this point. It is more my opinion which is not really "provable". Perhaps the remaining eps will shed light on this a little....