Doctor with no blue line

I have had this doctor for 10 days and no blue line has emerge or moved is this normal or has this doctor died.

I might be wrong but the staff (apart from the drivers) do not 'improve' with time atm.

This might change in the future.

I think if the level is exact (say level 9.0) then it has no blue line. My drivers appear like this sometimes, and then after I train them their level is like 9.1 or something.

Staff do not train overtime, their only attributes that increase is Experience, morale and charisma. (Morale & Charisma is trained through doctor, and experience through time). Neither of those three attributes effect the overall.

Staff level does increase David.  I have a commercial manager that was level 1 last season and is now at level 2.1 or something as there is a blue line along with the green line.  I believe the staff only can increase their overall if you do well in the races and meet your team goals.  I will say that it does take a long time to raise a staff member's overall by 1 so it's not really worth worrying about if you are progressing them or not.