Buddha as "lord" and Buddha as "choosing" his followers
"Lord Buddha" is used all the time ". Translations from Pali would often use language from the Bible, at least in earlier translations.

Sounds like appreciation to Lord Buddha for plucking one out of the fire of sensual desire.

Many people asked to be taught the teachings in many ways, some misunderstood the teachings before they asked and some understood at least what they were basicly about but in the above I think perhaps they are using poetic licence.