Scoot down a bit see the 3 light grey circle icons? They have links on them but you have to go to the bottom of the circles before the curser changes/ link shows?
the parent #item1 needs a “clearfix” (has actually height “0”) and for this reason, the two items below (#item21 and #item7) are covering the “link area”.
Never tried the “auto-clearfix action” but worth a try.