argh I answered yesterday evening and seems it dissapears (or i didn't validate), sorry.
for Tiredness pb: we'll investigate. it's not necessarily a bug because from what I remember there are several variables that leads to changes (as it's only a prediction with undetermined parameters and not a straight computation), but we have to check that before giving an answer on this point (or made a fix, it's a problem).
for your questions:
to get your fitness peak bonus you need 100 pts (full gauge) then during several weeks you get a bonus on Daily Fitness.
at the moment (on the screen) you have 2.7 points.
the red part shows you can't go above 70 points (that's because or your 66% fitness => no way you could get a fitness peak bonus with such an average fit!...)
training points (to help filling the gauge) should be more per day if your fitness improve
if your rider has some tiredness he could get some penalties but on the screen you have no tiredness and so no penalties.