Query manager has become almost the norm for agents to use. I have my dislikes about it, but my biggest question that has been daunting on me is this: Query manager asks for your query letter and your bio in two different boxes. Should the bio be kept in the query and than expanded further in the bio box? Or should it be removed completely from the query?
If there's a separate box for your bio, put all your bio info there.
Don't duplicate information in your submission.
This goes for any other boxes too: comps, pub credits, etc. for example.
I have a feeling that agents do this (have boxes for bio etc) because a lot of query writers either forget or just leave them out.