ap_ae_lines_all AND Source ID

In order to view Acounting Entry against an invoice Distribution, I need to make following join:

AP_INVOICE_DISTRIBUTIONS_ALL  <-> AP_ACCOUNTING_EVENTS_ALL (Based on Accounting_Event_ID)

AP_ACCOUNTING_EVENTS_ALL <-> AP_AE_HEADERS_ALL (Based on Accounting _Event_ID)

AP_AE_HEADERS_ALL <-> AP_AE_LINES_ALL (Based on AE_Header_ID)

and then Filter: where AP_AE_LINES_ALL . SOURCE_TABLE = 'AP_INVOICE_DISTRIBUTIONS'

and

AP_AE_LINES_ALL . SOURCE_ID = AP_INVOICE_DISTRIBUTIONS_ALL . INVOICE_DISTRIBUTION_ID

By doing that, few invoice distributions get eliminated becaise SOURCE_ID is not equal to INVOICE_DISTRIBUTION_ID but it stores INVOICE_ID... Why?