Yeh thats normal! Weetabix tends to be quiet filling
Izzy will for example have 2 peices of toast, a banana and a sausage before 11am, then we have a midday snack before lunch!
Also a satsuma really isn't going to fill her at all, as its all juice and a tiny biy of flesh
If I give her porridge, she just has a big bowl of that and doesnt want a banana or anything til midday!