serbar,

I think you have misunderstood 3FG. These signals are indeed "wrong codes", strictly speaking meaning nothing else than a complicated way of expressing around 100 milliseconds of silence!

Likely, these flawed signal were generated by some sort of flawed software. I like to point out that the program IrScrutinizer ([Link: harctoolbox.org]) in later versions can make sense of those flawed signals, (thanks to all the flawed signals on this site! :-) ) in that it allows the user to enter a number to replace the "silly" 0. And then they can be decoded by the program.