Aah that was better explained rules, because i refereed to another tread that said a false formation was if you used for example a DR, DMR and MR in same formation you made a false line. That is why i wonder since she had DC, DMC, MC, AMC.. 4 player sin a line.
in 41212 Diamond which is used often you have those 4, can't see the problem ?
it is just in the flanks