I really advise not to use one-on-one translation.
in general it is not a good way to do edi.
in botssys/grammars/edifact in fiel edifactsyntax.py there are syntax parameters.
parameter 'merge' is (by default) True for edifact, set it to False.
bots/grammar.py contains the overview of all syntax setttings.
but I really wonder why you should not want multiple messages in one interchange. This is how the edifact standard works....
if you would send different message-types, or send to multple partners, bots will nover merge the messages.
henk-jan