Guys, can you make sense of these figures or is my maths f'd up!

Injectors ratings:
Dead time at 13v/3bar = 0.8261ms

static flow @ 3 bar per min == 60,000ms = 451cc /60s = 7.51 cc per sec
Dyn Flow, 50% Duty, 3 bar= 3,000pulse x 10.0ms == 30,000ms = 224cc /30s = 7.4666 cc per sec with dead time added
Dyn Flow, Idle duty, 3 bar= 800pulse x 1.5ms == 1,200ms = 18cc /1.2 =15 cc per sec ?????????

static flow @ 3 bar per min == 60,000ms = 451cc / 6000 == 0.0751666 cc/pulse (10 ms)
Dyn Flow, 50% Duty, 3 bar= 3,000pulse x 10.0ms == 30,000ms = 224cc / 3000 == 0.0746666 cc/pulse (10 ms with dead time )
Dyn Flow, Idle duty, 3 bar= 800pulse x 1.5ms == 1,200ms = 18cc / 800 == 0.0225 cc/pulse (1.5ms with dead time )
0.1499985 cc per 10ms (6.66 pulses with 6.66 dead times )??????

Are these magic and flow more when shut ?

OK,I just realised I've calculated flow per 1000ms & per 10ms so obviously results are 2 decimal places different but the results match.
So they flow twice as much whilst spending half their time closed ???

What have I missed?

Thanks
Mitch