I received the same explaination from the editor of the Luach.  

If it is based on the CJLS document, then the second year of the triennial cycle would have been the same for all these years?

We noticed that during Torah reading.  We have several Torah readers from the local university so the overlap was not noticed beforehand.  I checked the Luach for the Conservative movement and that had the same list. 

 I checked the source document from The Committee on Jewish Law and Standards of the Rabbinical Assembly: A Complete Triennial System for Reading the Torah, 1988, updated in 1995. Those documents have the same list.

If I had to guess, I would say Aliyah # 4 should have been 27:4-6. Or, I am just missing something in all this?