How to use together with Punto Switcher? ...

[alex]

Too many characters are deleted on Break 

A. Uncheck function "Double rate on key repeat" in Tools->Options->Formatting->Smart Helpers.
When this option enabled, some commands are speeded up when buttons pressed delayed (and then time interval between commands is small).
Such logic applied for all movement commands and backspace or delete.

Punto uses backspace commands to delete old text and continuously sends them to HippoEDIT, simulating delayed press.
That is why 2ce more characters deleted.