Longsword damage inconsistency query

Hi all,

Got a level 3 Protector Aasimar Eldritch Knight fighter. Equipped with a longsword, my character sheet is showing 1d8+4 for the weapon damage, and 1d10+2 for the two-handed versatile option.

I'm not sure why this would be. The character has 15 STR, 11 DEX, and +2 prof obviously. Is the sheet adding proficiency to a one-handed attack for some reason, or am I missing some weapon option/bonus the archetype gets?

I've tried adding other swords (rapier, scimitar, shortsword) and they are all showing +4 as well, which seems wrong. Am I missing something really obvious?

The Dueling fighting style only works when you fight one-handed.

Duelling! Of course. I knew it had to be something obvious. Thank you!