Tymora's Smile does not give a bonus of +2 to all saves. Even more, it only says that reflex is suppose to be increased but that doesn't seem to take into affect, though I shall keep an eye out for it.

/* Rewritten to serve as Danger Warning
   When the Prime Underdark Guide reaches 3rd level, her danger       sense becomes so acute that nearby companions can become           similarly sensitive. Once per day, the Guide can confer a         temporary +1 insight bonus on Reflex saves to avoid traps or       natural hazards to one ally per class level, lasting six           hours. This bonus increases to +2 at 6th level and +3 at 10th     level.
   -Arkov */

/* Rewritten to serve as Danger Warning
   When the Prime Underdark Guide reaches 3rd level, her danger       sense becomes so acute that nearby companions can become           similarly sensitive. Once per day, the Guide can confer a         temporary +1 insight bonus on Reflex saves to avoid traps or       natural hazards to one ally per class level, lasting six           hours. This bonus increases to +2 at 4th level and +3 at 5th       level.
   -Arkov */