Dealing with the Infantry Peril

[RVPERTVS]

I´ve done some tests and for some reason I haven´t been able to pull it off, I cancel the tube´s weapon just as explained, I can hear the tube firing and the screen centers at the landing spot, no visible shell landing but next turn I get the (3.1) orginal delay again, I´ve tried shifting before firing and with no shift at all, tried also with turn 0 and in game bombarments and get the same result, so I´m missing something here? I remember having done it some years ago but now I´m not sure how.

I rephrase my previous questions:

1.- When shifting fire from arty pieces, after firing there´s one tube in the formation that gets more delay than the others in that formation for the next fire mission, what´s this due to?

2.- Is there a limit of fire missions when performing the "rolling barrage" tactic? I can peform it up to a couple of fires, after that, delay turns back again to it´s initial number.

3.- After firing I get targeted hexes that aren´t related to any unit in my bombarment screen. (this one I have some time wondering about I´ve asumed it´s due to some delay within the formation?)

Thanks in advance