That is absolutely normal for a baby to me waking that often. Just about all of them do, its why people say their baby is a'bad' sleeper, its normal in the world of babies to wake every sleep cycle for connection & nourishment , its just not compatible for all parents is all
There are many parents who continue to night parent after 6mths. Studies have been conducted to show that night parenting/ breastfeeding has health benefits & it has also have been attributed to lessening SIDS due to the safety or the arousal patterns. This is one reason why many parents dont feel comfortable with sleep training.
Have you looked into sleep cycle transition? That first waking 45minutes later seems very much like her waking at the end of her sleep cycle.
Id look to not put her down so early, she is having a 45min 'nap' & then youre asking her to go down again for the night. Id look to keep her up until the 9-10pm & ten settle her down for the night. Id hazard a guess you will likely get a solid 5hours (which is considered sleeping through the night at that age).
Have you considered bringing her into your bed when she wakes or putting her cot close to your bed so she has the security of you being there? You could also pull her cot right up to your side of the bed with the side on or off & be able to pat her through the night if bed sharing isnt your thing.
You might find the book 'No Cry Sleep Solutions' by Elizabeth Pantley helpful, or even "Sleeping like a baby' by Pink McKay
Here is a great link on infant sleep http://www.isisonline.org.uk/