Externally powered 192 led strip cosumes only 4A

hi!

here, using blinkstick to control a long led strip of 3 channels of 64 leds each and externally powered by a 5V 10A power supply.

today, making some tests about power consumption, I realiced that the whole led strip is getting only 4A, while I guess it should be taking near 10A.

the led are bought from here

where I can see that power consumption is 60mA per led.

the connection is done just like specified in

with the difference that the three segments have the power connected in serial. That shluld be the “problem”?

thanks in advance.