Ok, at this age their A times are more likely to be 3 hours long and there is no catnap, so what is happening is she is simply not tired enough to take a longer nap, shes happy when she wakes up because she isnt tired, shes also trying to get that extra A time in the mornings. you wont be able to extend a nap where she is undertired.
Sooooo, what to do? we start to gradually increase her A times, first of all increase it by 15mins and stick with that for a few days, then increase it again by another 15mins, you cant do it all at once as her little body cant handle a big jump in awake time, you need to do it gently. dont drop the catnap just yet, not until she can handle 3 hours A time