diff --git a/doc/classifying-signatures.md b/doc/classifying-signatures.md
index e1702a825b..63b92dfed9 100644
--- a/doc/classifying-signatures.md
+++ b/doc/classifying-signatures.md
@@ -41,15 +41,14 @@ question to ask is the reverse: **what genomes are in my metagenome?**
 
 We have implemented two algorithms in sourmash to do this.
 
-One, approaches based on lowest common ancestor ("LCA"), uses
-taxonomic information from e.g. GenBank to classify individual k-mers,
-and then infers taxonomic distributions of metagenome contents from
-the presence of these individual k-mers. (This is the approach
-pioneered by [Kraken](https://ccb.jhu.edu/software/kraken/) and many
-other tools.)  `sourmash lca` can be used to classify individual
-genome bins with `classify`, or summarize metagenome taxonomy with
-`summarize`.  The [sourmash lca
-tutorial](http://sourmash.readthedocs.io/en/latest/tutorials-lca.html)
+One algorithm uses taxonomic information from e.g. GenBank to classify
+individual k-mers, and then infers taxonomic distributions of
+metagenome contents from the presence of these individual
+k-mers. (This is the approach pioneered by
+[Kraken](https://ccb.jhu.edu/software/kraken/) and many other tools.)
+`sourmash lca` can be used to classify individual genome bins with
+`classify`, or summarize metagenome taxonomy with `summarize`.  The
+[sourmash lca tutorial](http://sourmash.readthedocs.io/en/latest/tutorials-lca.html)
 shows how to use the `lca classify` and `summarize` commands, and also
 provides guidance on building your own database.
 
diff --git a/doc/command-line.md b/doc/command-line.md
index 43c685170f..46d832aee4 100644
--- a/doc/command-line.md
+++ b/doc/command-line.md
@@ -231,7 +231,7 @@ using a collection of genomes with taxonomic information.
 
 ## `sourmash lca` subcommands
 
-These commands use LCA databases (created with `index`, below, or
+These commands use LCA databases (created with `lca index`, below, or
 prepared databases such as
 [genbank-k31.lca.json.gz, from the LCA tutorial](tutorials-lca.html).
 
@@ -281,7 +281,7 @@ Example output:
 
 ### `sourmash lca gather`
 
-The `sourmash lca gather` command classifies finds all non-overlapping
+The `sourmash lca gather` command finds all non-overlapping
 matches to the query, similar to the `sourmash gather` command.  This
 is specifically meant for metagenome and genome bin analysis.  (See
 [Classifying Signatures](classifying-signatures.html) for more