Your relationship does not support what you want to do. If you want data from table 5 to appear in a portal to table 3. An Tutorial: What are Table Occurrences? of table 5 needs to be linked to table 3, not table 4.
Note, using letters and numbers in place of field names actually makes this harder for most other people to find. Also, what you show does not give clear indications as to which relationships are set up as one to many and this can be a key clue as to why a relationship is not working as expected.