Wait, it half works.

on the 5th row, we see on column 3, 302,648,222 and under column 3 on the right side (or actual column8), 302, nor 648 isn't highlighted. Only 222 is highlighted.
Same on row 6 an 7th, with numbers 22,228,886 & 824,636,446. etc.

Why does it do half of it?

Unless it's not really made for many columns?

Cendrinne