Hi po, yung baby ko kasi is 9 months and 11 days old na pero hindi pa siya gaanong nakakabalance umupo ng unassisted kasi ayaw rin niyang umuupo.

If your baby is still responsive on some activities then yes normal lang. Milestones varies, hindi po pare-pareho mga kaya at hindi kaya gawin ng babies. Have your baby play interactive games. Tapos practice walking and sitting up. Gaya po nung unang comment watch videos to better guide you kay lo. :)