Use either underscores or hyphens for excluding/including, not both

I configure this module to use inclusions for textareas instead of exclusions. I find this to be more suitable. So when I add a new content type, I go into my profile visibility settings and add in the specific syntax for each textarea for adding and editing.

For the content type with machine name "page" this is the syntax required for the body textarea:
page@node/add/page.edit-body
page@node/*/edit.edit-body

For the content type with machine name "blog_entry" this is it:
blog-entry@node/add/blog-entry.edit-body
blog_entry@node/*/edit.edit-body

For whatever reason, you have to use hyphens for the textarea for a nodetype when ADDING a new node, but when editing, an underscore is used.

Is there a specific reason for this? I don't have time at the moment to look thru the code to investigate, but it seems that either underscores or hypens should be used, not both.