i did read it
"The other point is that current through the LED must be limited some how. The simplest way of doing this is with a series resistor. However, the resistor must be in the line that only takes the current for one LED"
this is what they say, it got me a bit confused, i did not understood this at first, English is not my first language, maybe that played a part in there as well, sorry, i am still on the learning path of all this.