Bluestar’s prophecy plotholes

Other than Rabbitfur and Ravenwing (who were probably only perceptive for plot reasons) most of the cats don't seem that smart when it comes to the parentage of half-clan kits.

Even now, in the case of Leafpool, they noticed her getting bigger, they knew about her history with Crowfeather, and then she has Hollykit, who is apparently the spitting image of Crowfeather (even though they don't really look alike, but whatever)
And absolutely no one catches on.
I guess the fact that Leafpool is a medicine cat, and they think she would never do something like that is to be considered, but still lol.

But yeah, that would make more sense.

The kits not remembering it despite being able to talk and walk and all that is believable (you weren't bringing this up but I've seen others bring it up) - humans usually don't have memories from before they are two when they grow up, despite often be able to talk, walk, and have identifiable personalities way before that. Especially if they are brought up in a Clan where it's never talked about - there's nothing to reinforce those memories. As for the rest of their Clan, the cats are sometimes shown to have memories that aren't inherently as long-term as a human's would be, especially when they are thrown off by said cat having the "wrong scent" - like with Graystripe, where everyone doesn't recognize him at first because they haven't seen him in so long, they thought he was gone forever, and he didn't have the "proper" ThunderClan scent.

     Also Mistypaw and Stonepaw would be harder to recognize than Graystripe. Graystripe was a well-known deputy of his Clan, while Mistypaw and Stonepaw were just some kits that disappeared months ago, no one but their mother, Thrushpelt, and the other queens and kits in the nursery at the time would have really gotten a chance to know them. When you here the cats telling stories of the past, it's always about dramatic events with adult cats with well-known characters, big battles, etc. Sure, they might mention "oh, yeah, remember when Bluestar lost her kits?" but they aren't describing in detail the kits' names and what they were like and their appearances, that story is only remembered at all in relation to Bluestar, their respected leader who they see every day, being involved. It's more like "Bluestar had kits once who died way back then, that's kind of sad, poor Bluestar" and less like "Remember Stonekit? Oh, he used to be the sweetest little baby and had such a charming personality, and had that beautiful blue fur like his mother...".

     In addition, one-moon-old kits are going to look very different from themselves as six-moon-old apprentices! If a one-moon-old kit is like a two-year-old child, then a new apprentice (and they could have been older than new apprentices, some have to wait moons before their first gathering) would be like a teenager who is recognizably not fully grown but is most of their full size and mostly physically mature (like the equivalent of a 14-year-old human). Think back to some little baby/toddler you know. If you saw them again after a complete absence of 12 years or so at 14 years old, would you really be able to recognize them? Especially if you thought they were dead? 

     As for the names being the same, warrior names aren't exactly uncommon or never reused. There was literally a Mistkit in ThunderClan not all that long before Mistykit. And people, or cats, are just less likely to see what they are not looking for. A cat going to a gathering is probably there to see old friends, to enjoy the sacred experience, to spectate on Clan politics and to try to find out some Clan secrets or pick fights with enemies themselves. They probably aren't going to care much about the boring "RiverClan has two new apprentices, blah blah and blah blah" part (well, except for the part where leaders are using their BIG CROP OF NEW APPRENTICES to posture strength, but in that case the focus is still on the leaders, not the names of whatever poor apprentices are involved). Especially if their name announcement was not the same moon as their first gathering (which happens a lot in the series); a cat might hear of the existence of a Stonepaw  and a Mistypaw, then see two apprentices who look kind of blue-gray a moon or two later when they had forgotten those names that were mentioned once on an aside, and never know that those two random faces in the crowd are Stonepaw and Mistypaw. No one really had an idea about Bluestar's relationship with Oakheart, they all saw her as a dutiful warrior who wouldn't do that and was also going to get together with Thrushpelt. They aren't looking for two out of three dead cats being secretly alive and in RiverClan, so they aren't going to see that they are alive and in RiverClan. 

ok but you kinda have to be a total moron to not notice "hey, bluestars kits with the same names died and suddenly theres kits that would be the same age as hers if they were still around being in riverclan all of a sudden" like, they still have the same fur colours as the dead kits and all too

arent they noted to have the same fur colour as her as well like how many blue grey cats are around at the time lmfao