Jan 7 Puzzle is a mess

I found a number of parts of this puzzle poorly constructed

>!behind in Buckingham Palace 🇬🇧🍑 : Could be arse or bum, crapshoot as to which is right!<

>![dollars in a Benjamin 💵] = 100 : Sometimes they accept either text or numerals, but this time did not accept "hundred"!<

>![bump you're warned about on a sign (usually) 👊] = speed : the reference to the sign was enough for me to guess correctly, but the fist emoji is completely irrelevant and clues "fist bump" instead of "speed bump." Why is it there?!<

>![___ Bronco] = Bucking : Capitalizing "Bronco" indicates it should be a proper noun, so I guessed "Ford" as in the car name. Shouldn't be capitalized for "bucking bronco"!<

Bracket City would be so much more fun if they could just settle on a set of cluing conventions and follow them every time.