We are not aware of any issues that would prevent the text from displaying the same between the description and the Seller Details profiles given that you have applied the same formatting in the editors for them for the text.
Please let us know a few examples of where you have run into this in some of your listings and which profile you have associated with them in a support case, which you can file at any time from under the Help tab of the site so we can take a look.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .