Is the pregenerated dragonborn sorcerer's Charisma saving throw bonus wrong?

Question

When looking at the Dragonborn Sorcerer's pre-generated character sheet, the character's Charisma saving throws seem to be wrong. For the level 1, 2, 3 and 4 sheets, I think it should be +5 instead of +6. For the level 10 sheet, I think it should be +8 instead of +9.

My reasoning:

At levels 1, 2, 3 and 4, the CHA modifier is +3 and the proficiency modifier (which applies) is +2. This results in a +5 total, not +6.

At level 10, the CHA modifier is +4 and the proficiency modifier (which applies) is +4. This results in a +8 total, not +9.

Am I missing something here, or are these actually typos?

I'm a pretty novice DM, so I apologize if I'm missing something obvious.

Answer 1

The Dragonborn Sorcerer has a Charisma of +3 and a base Proficiency of +2, meaning that a +5 Charisma Save is accurate for levels 1-4. At level 5, the Proficiency bump means that +6 is accurate.

By Level 10, the Sorcerer has increased Charisma to 18 for +4 and has a +4 Proficiency Bonus. +8 Charisma Save would be correct.

Definitely looks like typos.