I haven't seen those instructions, but as a technical writer, I'd wager that those instructions were either written by someone who is not a native English speaker, and/or they were compiled and written by someone whose primary responsibility is not technical communications.
Everybody thinks they can write, and many companies believe they don't need to invest in professional communicators (engineers, not writers, often document their own products), but the results they produce clearly suggest otherwise.
Love my '04 DL1000
(but still miss my '00 Monster 750)
"Never underestimate the power of stupid people in large groups." -Steven Wright