diff --git a/readme.md b/readme.md
index 4d4f616..950cf4a 100644
--- a/readme.md
+++ b/readme.md
@@ -204,6 +204,7 @@ Options for creating a Graph/Data file:
   * The read depth (number of times each sequence is read)
   * The read error rate (probability a sequence is misread)
   * The error collision rate (probability two misreads produce the same spurious sequence)
+  * The real sequence collision rate (probability that a misread will produce a different, real sequence from the sample plate. Only applies to new misreads; once an error of this type has occurred, it's likelihood of ocurring again is dominated by the error collision probability.)
 
 These files do not have a human-readable structure, and are not portable to other programs.
 
@@ -361,6 +362,7 @@ roughly as though it had a constant well population equal to the plate's average
 * ~~Add read depth simulation options to CLI~~ DONE
 * ~~Update graphml output to reflect current Vertex class attributes~~ DONE
   * Individual well data from the SequenceRecords could be included, if there's ever a reason for it
+* ~~Implement simulation of sequences being misread as other real sequence~~ DONE
 * Update matching metadata output options in CLI
 * Update performance data in this readme
 * Re-implement CDR1 matching method