Okay, so here are the circumstances. For the Rogue class in the PHB, p. 95, Dexterity and Intelligence are listed under Proficiencies > Saving Throws.
Does this mean I am granted the proficiency bonus in addition to my DEX and INT modifiers towards those saving throws?
Also are all of your saving throws granted bonuses from ability modifiers? Say I'm not proficient in CHA saving throws - do I still get the +1 from having 12 CHA?