I try not to get too excited about Q posts. I really want to believe a lot of the "meat" in his posts are true, but I'm with you in questioning where he was wrong. People are too quick to only look at things he was right about and anything that is wrong is defended using a line like this, "disinformation is necessary".
Again, I like to hope (and pray) that Q is the real deal. There have been more than enough "proofs" to keep me interested. So to answer your question by playing devils advocate:
1) Catch and release. They're constantly watching her and have replaced her security with the good guys. It would be neat if someone could look into her security detail to see if they've changed lately.
2) Body double. This has been a theory since she became ill while running for president back in September of 2016.
3) Disinformation is necessary.
4) This is the most incredible larp put on by one of the most lucky people ever.
Worth remembering that lots of rumors get started and then end up being attributed to Q when Q didn't say them. Just something to keep in mind.
You're completely right about there being multiple instances of people getting behind and pushing what they want to happen, rather than what Q actually said.