I'm assuming you want a longer burn when you're filling it up 3/4 vs 1/2.
If you go 3/4 basket try pulling a handful of the unlit from the edge of the basket (a little pocket) and putting the lit ones back right in that spot. This will give you a good minion burn from the edge of the basket outward and won't be smoldering too many of the unlit coals which might be your problem... hope that helps.
Cookers: Creator of Octoforks™ Rotisserie System U.S Patent Pending
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Official 007 Thread: "007" http://www.bbq-brethren.com/forum/sh...d.php?t=231293