It appears that your current
"lead level" is not only insufficiently high, but also at the incorrect "angle".
Here is my factory correct S60 (21 pounds) with the black line indicating the level of the lead
Here is my factory correct S100 (45 pounds) with the black line indicating he level of the lead.
The surface of the lead appears to be perpendicular to the TOP SURFACE of the fluke. In other words, if you position the fluke the the top surface oriented "plumb" when you pour the lead, that should give you the correct angle.
I hope that helps.