She is getting so big so fast

. I was looking at pictures from when we got her a little over a month ago and she was so tiny. She's more than twice that size now. Where can I find a growth stunter?
Ok now onto the real question. She has gotten so much better at potty training. She rings the bells almost every time she has to pee and has drastically cut back on the number of accidents she has. Sometimes she rings the bells just for the fun of it, it gets annoying sometimes since we just got back inside. Anyways, she however for some reason HATES to poop outside. We will take her out and wait and wait and wait. After she pee's all she wants to do is dig, eat the grass or hop around and chase the rain drops. Then without warning she will poop inside. She doesn't sniff around or anything. Just squats right in front of you and goes. Even though we have her on a pretty set schedule as far as feeding and sleeping go, her pooping has pretty much no schedule. I thought she started to get on one, but then that went out the window. She usually goes first thing in the morning, and I noticed about half hour before bed....sometimes. Other than that, no nothing. She didn't go last night. This morning she went 3 times (in the house) in a matter of a couple hours. Then went almost right after dinner which pretty much never happens for her. We give her treats for going outside, praise her a LOT. What do I do?
Another thing, she tends to walk and pee. She will squat and continue walking while she is going. When she starts to go in the house and I try to stop her to take her outside, she keeps going and walking towards the door at the same time. So rather than a puddle to clean up, I have a line of pee across my living room carpet.
Any suggestions?