All the time. It drives me crazy. Sometimes it's my own stupidity (not reading carefully enough, trying too hard, etc.) but often it's just poorly worded instruction, maybe written by someone who didn't major in English, or who perhaps doesn't even speak it
Writing good instructions is somewhat of an art form. I like those (rare) instructions that try to give you the "big picture" or what your objective is on a specific step so you actually have some idea WTF they mean.