Can you clarify what you mean by "two forms from each datasource"?
Do you mean one form for each source = two forms, or
Two forms for each = four forms?
Either way, if the forms connect to the source there's no reason you can't submit them. Can you post some screenshots to provide a little more detail - also more detail on what isn't working? Is there an error? What data is populated in the forms? There may be something else happening, some more info will help us figure out what it is...