Roy said he was 22 in the issue where he got custody of Lian. I wouldn't think her two, but I'm bad at real kid ages, muchless comic book ages, and so a young two, maybe? But she's being bottle-fed in a later issue, so I don't think she's supposed to be that old.
I think more a problem that the adults have aged too slow. They should be in their 30s, given Damian's age. Of course, originally Dick was 19 when Bruce met Talia (and Talia was a student - perhaps 19, herself, which I would not have guessed, since I'd originally projected US-medical school age on her, which was inaccurate). Was he ever speed-aged in-cotinuity. I know retcons later put Bruce's relationship with her much earlier.
Oh, oh, do we need to talk about Nightwing Year One (I think it was that - maybe it was something else) making Dick Grayson 21 in 2001? That was a WTF? that I completely ignored.