This is an issue with selecting a child of a parent.
Find $('#_lcs>#test1').length
Find $('#_lcs>#test2').length
Find $('#_lcs>#_test3').length
Find $('#_lcs>#test4').length
Some test 2
Some test 3 with an _ character in the id
Some test 1
Some test 2
Some test 3 with an _ character in the id
Some test 4