My 6 mo daughter has consistently been rolling from BACK to TUMMY for over a month now but hasn't mastered rolling from TUMMY to BACK...all the articles I read online say that this is usually by done in reverse order!??? I "think" I mentioned it at her 6 mo well check and the Dr didn't seem concerned but I just don't want to be behind the milestones. I do actively encourage rolling back over during playtime. Thoughts??? Suggestions??? She has also almost mastered independent sitting so I feel confused if she's behind her milestones or not. Thanks!!