What @Sadurian said.
You're also double counting your sleight of hand bonus.
You get your dex bonus (+3) to all dexterity-based skills (stealth, acrobatics, slight of hand).
Then you get your proficiency bonus (+2) only to the skills that you are proficient with (e.g., sleight of hand). This is determined by your background/character creation.
Thus your final bonus to your sleight of hand is +3+2=+5
Similar for all skills.
Guidance: Basically the game rolls the 1d4 for guidance twice: once to determine the displayed DC and then once again when you actually roll. However, the displayed DC-based off the first guidance roll-is not updated with the second roll.
Example:
True DC = 15
You have 0 natural bonuses and roll a +4 for guidance -> Displayed DC of 15-4=11
You click the "roll" button, which rolls the d20 for the check but ALSO rerolls guidance. Guidance rolls a 1, making the new DC 15-1=14. However, the old DC of 11 is still displayed.
You roll a 12. The visible DC says 11 but is actually 14 because of the updated guidance bonus -> You fail the check, even though it looks like you should pass.
