OMG, I could have written exactly the same thing! My LO is the same - textbook at first, and now at 10 weeks, she seems like a spirited baby to me! We have pretty much the same routine, except that she doesn't always wake up at the same time - could be anywhere between 7:30 and 10:00! In the morning, she has great naps, falls asleep ***almost*** on her own, but as the day progresses, it gets bad and then worse! Her naps get shorter and shorter, and after I lose patience and take her out of her crib, she can stay awake, smiling and cooing for another hour, even though she only slept 45 minutes. I sometimes wonder if she really needs to sleep longer since she doesn't look tired or if I don't read her fatigue signs well enough...
She also screams for up to an hour before going to bed, we do pat/shh (more like bounce/shh here, since she's a back sleeper) but I have no patience for this!
Do you swaddle? My DD seems to really hate for a couple of minutes until she starts relaxing, can take up to 10-15 minutes, but she sleeps better that way. I need to swaddle her, then walk her a little in her room until her eyes start to close and then I put her in her crib and bounce/shh a little. Sometimes it work very well, other times I have to start everything all over again a couple of times...
I also have a 3 year old DS and it does make things more complicated in the evening. Seems like we don't have the time to take her to bed at the right time, or we don't notice she's tired on time, so I think she sometimes gets overtired. That could explain the crying at night. But we do include a bath in her routine. DS goes to bed at 8, she has a bath around 8:30 and has one last feed around 9. If we're lucky, she's sound asleep around 10 PM.
Anyway, I'm hijacking your post here, just wanted to say you're not alone!