I think your first tracker issue is the same as what I posted. Basically asking to be able to enter real numbers as the grade cutoff in the Grade Letters settings.
As for the second one - take a look at: http://server3.moodle.com/browse/MDL-6226 which also looks similar.
Rounding Up Final Grades in 1.9.4+
This discussion has been locked because a year has elapsed since the last post. Please start a new discussion topic.