BC7008 duplicates items

[alaskascooter]

Several tests show when 7008 is used on Spigot 1.13.2, items are duplicated if config is set to keep items true.

Interestingly enough, this dup has consistently been (N*2)-1, or if you start with 64, you end up with 127 instead of 128.

Have to set keep items to false for now.