How to understand the levels in the result file?

[billzt]

This is a row of my result

;SeqID	MislabeledLevel	OriginalLabel	ProposedLabel	Confidence	OriginalTaxonomyPath	ProposedTaxonomyPath	PerRankConfidence
MN952976	Domain		Pempheriformes	0.999	Metazoa;Chordata;Actinopteri;;Lactariidae;Lactarius;Lactarius lactarius	Metazoa;Chordata;Actinopteri;Pempheriformes	0.999;0.999;0.999;0.999

My question is: (1)Why the MislabeledLevel is "Domain"? (2)How to prepare the taxonomic annotations file in -t correctly? How to do if certain level is missing? Currently I just put an empty string there