I went to this site to see what the original Greek met in the use of the word blameless.
http://net.bible.org/verse.php?book=Luk&chapter=1&verse=6
At the bottom of the page I found this note:
tn Grk walking in (an idiom for ones lifestyle).
sn The description of Zechariah and Elizabeth as following
blamelessly was not to say that they were sinless, but that they were faithful and pious. Thus a practical righteousness is meant here (Gen 6:8; Deut 28:9)
So sinless and blameless are not the same thing in this case. Just my opinion...
Jesus was the only sinless One who ever lived down here on earth. Yahoo!
5) to wander from the law of God, violate God's law, sin
They didn't wander from God's commandments and ordinances.
Sometimes, the text means what is says. Not everything has to be tortured and convoluted.