Quantum mechanics doesn't have "particles", it has "quanta". They're fundamentally different things. Your intuition about particles does not apply to quanta.

Think of light. You can shine a red light and a blue light on a surface at the same time. Even with a purely classical vew this gets modeled as a superposition (addition) of the intensities. That's still wrong for how quantum superpositions work, those are adding the probability density functions of a propersty of the quanta, not the properties directly. But it's closer.