Hi,
as you flow you need to create the 2 DTP.
1 dtp - form data soruce to DSO.
2 nd DTP form dso to info object.
but you are saying the one DTP as added in PC that DTP correpted.
pelase fallow the below steps while assing to TR.
1 TR - data soruce and info pacakge
2 TR - DSO and info object and transforamtions and DTP.
now you have 2 transformation and 2 DTP's.
after moving PRD change the correct DTP with technical name then your problem will solve.
Thanks,
Phani.