Regarding your formula failing to pull through Item 12. Look at the $A1 part of the formula I've put in bold below:
=IFERROR(INDEX('Del Note'!B$18:B$63,SMALL(IF('Del Note'!$A$18:$A$63<>0,IF('Del Note'!$A$18:$A$63<>"",-17+ROW('Del Note'!$A$18:$A$63))),ROW($A1))),"")
I notice that you've...