Despite the problem of not being able to add dragonmark spells to spell lists being mentioned in this thread and was was supposedly patched in this update I am still having problems.  The thread was added to even after it was resolved, character sheets of all spellcasting classes and races continue to struggle with this issue.  I was halfway through finishing up a character when I fell down this rabbit hole.  It allows me to select the spells under the "manage spells" side menu but they do not appear on the spells section of the character sheet itself.

I hope this can be resolved after several people have mentioned in it the past.

In that other thread, you mentioned you are playing a Wizard. As a Wizard character, you have to first add the spell, and then you have to prepare the spells to get them to show on your character sheet.