could it be that there is some people you just can't connect with?
I have had a very poor reading for myself and done a reading which went entirely wrong and sadly I never repeated those with the people and so I can't say if it was consistent or not.
if you did everything you normally do and it just came out inaccurate, perhaps it is a connection problem? I have noticed on AT there is some people I have a closer bond with and we do amazingly accurate readings between us but I have not faced the consistently inaccurate readings yet. If you can have special bonds with people where you just know it's going to be a good reading, perhaps there is some people you can never connect with? for whatever reason in the universe.
As well as the fact it could just be two people who don't connect on whatever level, also different readers provide different styles, my own is practical and empathetic. I am quite sensitive and touchy, feely, other people do to the point readings, we all have our own style. perhaps your style just don't work for the person but don't take it personally if people are getting good readings from you