I'm having an issue with the Message template.

Tables are impossible to edit when built in the template using the Insert Table button.  I made a table in Microsoft Word and pasted it into the Template Text Box.  This worked gracefully on all the templates but one. 

I need to edit the template, but it won't let me delete the table from the text box.  I've tried all the obvious ways to do it.  I can edit the text, but it seems like it's not recognizing me selecting the whole table.

Any ideas on how to delete the table, or reset back to the default message for just the one template or make it let me edit the html? 

It's in the lower section of the Notification Rules area:

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