Emily was small at birth and slow to gain weight, being a premmie played a part in that, but also she is just a small girl anyway (like me

) and probably would've been the same had she been full term. In the early weeks after coming home from NICU, Emily gained between 70 - 110 gms a week, even with feeding 3 hrly day and night. At the most she gained 200 - 250 a week during her growth spurts. She was otherwise happy and healthy, with plenty of wet and dirty nappies, a good sleeper and in proportion for her weight/height ratio. Although the nurses were all concerned because she was still so small and didn't gain much weight, which really did my head in, especially when she started sleeping longer during the night and they told me I should keep waking her for feeds. Although when I did it just made her grumpy and irritable and she wasn't overly interested. So in hindsight I think she was getting all she needed during the day and so just wanted to sleep at night, not feed, so I should've gone with my instincts and let her sleep.
She's 10 months and still in the lower percentile of the charts for weight and height (I think she's about 6.5kg now) but tracking along nicely. She eats lots and still has plenty of wet and dirty nappies and developing normally, so I don't worry about her small weight gains anymore. As I said, she's just going to be a very petite little girl like me.
I wouldn't worry about what the plunket nurse has said. Sophia sounds like she is a very contended baby and getting plenty of feeds in during the day, so I say let a sleeping baby sleep.
Like mamapickle said, stick to you guns and only you know your baby best. If you think Sophia is happy and fine, then she probably is and there's nothing to be worried about.
You're doing a fab job