So, real issue is that one of these needs to be edited to be correct.

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Level 8 Spellsword / 3 Ranger - Base Race Human, Major award race on top of it
Expected behavior, Mage armor gives x2 Ac for total of 8
Current behavior: Only gives four.
Steps to test:
Strip all armor/items from character, starting ac = 15
Cast mage armor
See AC 19
Reference from Spellsword wiki: Mage Armor - At level 8, Mage Armor (spell) gives the spellsword x2 as much AC. At 15, it gives x3 as much. Note that multiclass characters need the majority of their levels in spellsword to receive any bonus. For example, a character with 8 spellsword/4 fighter/4 rogue, would not receive any bonus to mage armor, whereas an 8 spellsword/4 fighter/3 rogue would get the initial double bonus.