When attempting to remove an erroneous entry on this page (Upload list of plants | Continue processing previous uploaded Roses plant list | Matching Method: Individual manual search)
the 'remove' button stopped working after the first correction was made. Try it by attempting to remove the entry "Main Garden". for instance, then the entry "Main Garden markers sor". I think the first attempt may work for you but the next one will not.
Otherwise this update feature is quite a nice applet.
Also, is there a way to format text to BOLD, as html seems to be ignored?