Hi @akash,
This is not a typo, microbial taxonomy is currently in flux. You can see some details about Bacteroidota changes. Particularly given all of the increasing knowledge of microbial relationships being discovered through genomics. Many databases, including SILVA and GTDB are gradually updating and refining taxonomy.
To give you an idea of how much, and how quickly, taxonomy is changing check out the following :
- Microbial Taxonomy Run Amok
- A complete domain-to-species taxonomy for Bacteria and Archaea
- A standardized bacterial taxonomy based on genome phylogeny substantially revises the tree of life
- Proposal of the suffix –ota to denote phyla. Addendum to ‘Proposal to include the rank of phylum in the International Code of Nomenclature of Prokaryotes’
-Cheers!
-Mike