Edited to reflect updated understanding of issue:
Labman expects the wet lab to put values from qiita.study_sample.sample_id into the platemap, but that the wet lab does not actually have those identifiers. Instead, they have tube identifiers which (usually but not always) are found in the anonymized_name column of the sample metadata.
NB: We need to determine which of the labman outputs need to contain tube ids and which need to contain sample_id before attempting to fix this issue.