Increasing two different servo PWM's with different delay's

AWOL:

Also I wanted to check if it is possible to increase the microseconds in decimal fractions such as 1.5 or 3.9.

You could using floating point, or you could use a fixed point representation.

Sorry, I am fairly new to this and still learning, how would I do this, and would this cause problems with the servo, or are they ok with reading a signal of say 3.9?

Thanks