Some versions of BLAST+ (confirmed for 2.2.28) have a bug which causes truncated hits to be returned even if the query has a 100% match and 100% coverage of a target sequence.
This bug was fixed with BLAST+ version 2.2.30.
You can download the latest version of BLAST+ from ftp://ftp.ncbi.nlm.nih.gov/blast/executables/blast+/LATEST
Installation instructions can be found in the Geneious Manual.
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