Q1: As for your first question, Floor 2 only answer you one point.
There are still others problem.
1. Cleaning head is one way.
2. Do alignment is two way.
3. Rip Software control Epson 9600 Paper feeding is third way.
Q2. it depends on which Rip software you have used.
If it is old version of Best Color, try to upgrade to EFI Colorproof XF 2.6
There 3CC Calibration function, it may help you.