Oo naman, totally normal yan! A few of us with formula babies noticed na ang poops ay nag-vary depending sa brand ng formula at kung paano sila mag-adjust, kaya twice a day is really fine at walang dahilan to worry. Basta healthy ang color (yellowish or brown) at consistency, and active at masaya ang baby mo, you're good na! If it changes suddenly, like marami na siyang poops or may blood, that's when you check with your pedia, pero from what you're describing, your little one sounds doing great talaga.