Improper Weapon Math

For some reason on my friends Ranger, the math ain't mathing. She's got a +1 STR and +2 Proficiency bonus so her Unarmed should be +3 like her Horde Sword but instead it's +4. Additionally her Dex is +3 so her Short Sword should be +5 not +6. Her bows and my custom items are correct but I don't wanna have to manually override every weapon in the future.

https://www.dndbeyond.com/characters/166206244

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Without being able to see the character, it's hard to say for sure, but you may have a homebrew magic item equipped that uses the "Melee Weapon Attack" modifier with a Fixed Value of 1. This would provide a +1 bonus to all melee attacks. People tend to select this modifier thinking that it only improves attacks with the magic weapon it's applied to, but that's not how it works.

Yup that's what it was, thanks!