Yeah, try this:
Do a squat just with your body (no additional weight).
Legs side by side around shoulder width. Now, bend down to around parallel with your arms out in front. Where do your knees go? If they collapse inwards, your inner quads are weak. Start doing these and pushing your legs out by controlling that muscle. You'll feel it in the inner quad. That's one of the rehab exercises I've been told to do. There are a host of other issues that might be to blame.
My point is simply that when you concentrate on working one part of your body and neglect the resulting imbalances, you can really get some bad issues if you don't take care of things.
knock kneed can also mean that your feet need a wider stance.
spread eagle is the opposite.
Can you clarify this? I.e. which direction your knees go in each case?
In any event, stance is one thing, but it can also be caused by muscle imbalances as it was in my case.
Point is, if they're doing something funny, figure it out and address it (PT, shims, wider/narrower cranks, etc) or it might lead to injury.