This is my favorite:
Haynes: Locate ... Translation: "This photo of a hex nut is the only clue we're giving you." I don't know how many times I've run into that one.
Haynes drives me crazy with their incredibly detailed instructions on one area where any dunce could figure it out, then some statement that covers a 47 step process in one statement.
I was doing a rear brake job during the summer and after covering every little detail down to where to goop the pads, the Haynes book said "loosen parking brake adjustment at the hand brake". That's it. So, I go looking for the instructions... nothing to be found. Turns out it takes a half hour since you have to remove the console, part of the dash to get there, etc. Haynes covered it with "loosen parking brake adjustment at the hand brake".
They claim to tear down and do every job listed. If so, they must have an editor that says "you spent too much time on that book, finish it now" because they take some serious shortcuts. (Don't flame me for not buying the factory manual, I know the chance I take with a POS Haynes and I accept responsibility :-)