When a corpse is stuffed to the brim, some items get skipped over. Some gems that are marked for destruction remain, and one dragon is looted but the rest (marked destroy) remain on corpse. One gem + 3 ores remain on corpse.
The crystals are ignored, but the augments are destroyed on one corpse, but on another, the opposite happens.
the destroy option has been similarly unreliable for me. i'd recommend just using ignore (or removing the item from the list) rather than destroy, because if destroy hiccups and you're left with some gotdamn zany zingers on your cursor you wont be able to loot a real item if it comes up next. i went through and just removed all the "destroy entries" from my .ini and it's been smooth sailing.
when "destroy" bugs it looks to me like it's going through the destroy button logic before the item is on the cursor, which means you're left holding it afterwards. if the next item you encounter is also a "destroy" this resolves itself but if it's a "keep"er you get the "can't loot with item on cursor" error and skip the corpse. the destroy-before-loot issue seems to happen reliably with certain items although it's seemingly unrelated to ABC order, as both delicious pumpkin bread and zany zingers fail while pumpkin candy works perfectly. i skirted around it by taking out all the "destroys" as mentioned above, and supervising the looter during the process (only because i'm paranoid, haven't seen it miss any goodies since removing "destroy" flags).
overall this macro is a huuuge qol improvement, 5 stars!