I don't think she's tired enough hun. Being cranky could be related to teeth, development, just an off day, anything really! Trying for 2h45 A time is pretty short for her age, and given how long she is taking to settle I think you either need to push for the one nap, or if you're doing two then one of them needs to be short, like 20/30mins. Did you read the link about the 2-1 transition?
Have you ever noticed if she has a preference for a longer or shorter A at any point in the day? From a 6am start I would put her down somewhere between 11-12 depending if she likes a shorter morning or a shorter time to bed, or split the difference if you're not sure.