need help from experienced jms.

my baby will be 11m soon. she starts to mimic me, but in a very strange way.

for example, she normally get the words right in the first time she tries, then she couldn't get it right again.

that day, we were at the park, she were very excited to see many pigeons and started to say "ah", i told her "鸽子", and she said it right. i was very surprised and repeated the words, wanted to hear her says again, but it was the usual "ah" again.

another incident was she droped something from her highchair and as a habit i said "没有了" with hand gesture at the same time. she did the hand gesture and said "没有", loud and clear. again, i repeated the words, but she only said "ah", i tried many times, her "ah" only got louder and louder, as if she was frustrated to herself.

there were many incidents like that.

yesterday, when i was nursing her, i said "吃奶", cc said "奶吃", she had it the other round....

i start to worry about whether all these are normal for a baby who is trying to learn to talk.

any jms have any experience on this issue?

thank you.