Yes and yes!
Kneecaps have to move. But they have a real tendancy to stick to the outside of where they should be, because of tightness in the structures that run along the outside of the knee and attach to the kneecap.
This is your lateral rerinaculum, which is the end of your ITB - hence the rolling bit.
It doesn't matter what activity you do, to stir this up, as long as your knee bends more than 35 degressish, as this is when your kneecap starts to move into a groove on the front of your thigh. There's oodles of this in cleaning....and beding and squatting and holding prolonged positions.
You need to mobilise (or be mobilsed!) your kneecap, inwards to stretch the tigth tissue on the outsidd that hold your kneecap in the wrong position.
When you roll you leg inwards, the thigh bone rolls (inwards) under the kneecap, which in essence stays still (and so "apparently" moves more to the outside) because of the tightness and pull of the tigher tissues that sit on the outside of your knee.....your ITB