So, you see in your wysiwyg that there is a button on the bottom row next to Font size that is <>? Click that and look at the html. I bet the html will be weird, if not seriously ugly. If it wasn't typed in the box as html, it may have been cut and pasted from Word or something similar...sometimes pasting has weird effects--I think the same thing happened on my site a while back--clear out all the formatting and re-do it in the details area.
The first image is just the set up for the email--anything in [ ] will populate with one of the fields from the second area. It looks like several of the items in the details are unnecessary (Dates, times).
Completely unsolicited advice:
I try to limit what I put in details to things that aren't already
identified in other fields. You can also add fields to your sessions options (like...location,
venue, room, etc) which can cut down on details, too. You do have to fiddle with the default email text to get those to show but it isn't too hard. If you've got a vendor, you might be able to get them to take care of language pack stuff.
And, in site administration, you can select what are called 'Session roles' as teacher or trainer (if you have a custom Trainer role--I used to for courses that had 10+ trainers who I didn't want to give teacher permissions to) or whatever for the F2F plugin. Then you enroll the trainers in that role and you can check their name in a list or checkbox and it shows up in the session info (maybe not the email).
