Editing World Map Manipulation (section)

=== Bumping ===
When determining what encounter formation to generate, if the formation is generated from the Standard encounter table (as opposed to the Special table) and the formation is equal to the previously generated Standard encounter formation, the formation is re-rolled exactly once, and that formation is then always used. This is important to consider when repeatedly manipulating the same formation or set of formations, or if it is possible to have just encountered that formation.

This will not happen with encounters from the Special table, Chocobo encounters, or Yuffie: they do not compare against the last encounter formation, and they do not set the last encounter formation.

The previous encounter value used for the World Map is distinct from the one used for Field encounters. This value persists between world map loads and is saved to and loaded from file.