EMI Loot 0.7.6

As per the wiki, the chances for a wither skeleton skull drop are as follows:

EMI Loot displays the chances as such:

The unenchanted chance isn't converted into percentages and the following "+" suggests that the following percentages are added to the base unenchanted chance when this is not the case (it becomes 3.5% instead)

There is a similar problem with the direct drop of the wither skeleton's stone sword:

Which shows the non-percentage version of the normal drop chance (Since it's a direct drop I care less about it but it's relevant to this issue)