crochet help

[meistercats]

The pattern reads

INSTRUCTIONS
Back: Ch 69(73, 81, 85, 89, 93, 93).
Row 1 (RS): Working into back hump of the ch (see Project Stitches), sc into 2nd ch from hook, sc into each ch until end - 68(72, 80, 84, 88, 92, 92) sts. Work even in BP for first 2(3, 3, 4, 4, 4, 4) dc rows. 68(72, 80, 84, 88, 92, 92) lps/sts; 17(18, 20, 21, 22, 23, 23) broomstick clusters.
Armhole Shaping: Cont working in est pattern,

Can anyone tell mwe what (work even in BP)?

Thank you Lori

[zanne042]

Its been quite some time since I have crocheted but I think it is referring to crocheting in the back post.
This is also a great site for crochet help