the determiners’ order

Because in Set Theory, 'such' specifies particular universe of discourse whereas 'many' does not. It is a subset of that universe. So we can talk about 'many novels which deal with marriage' or 'many such novels', but it makes no sense to talk about ' which deal with marriage many novels. The word order reflects subset of a set, not set followed by a subset.

There is a cross class phenomenon of some determiner. For example,"such" is both predeterminer and postdeterminer.But only in like "such a","such an".....can be considered as predeterminer.When the collocation with others,such as"some,many,any,all,few,another,other,one",it is the postdeterminer,and it should fellow these determiners,for example,"some such,any such,no such,few such many such".