Caravan club route planer

I traveled from Newark to Henley today using my Audi sat nav and the CC route planer.

Until the last 10 miles everything was fine then myAudi sat nave said leave the M40 at junction 6,the CC route planner on print said take junction 5 but on the same paper the CC map said take junction 4?????

I took number 5 but WOW I was wrong 3 times in 3 miles I had to do a 3 point turn in what I'd call a 1 and a half track road,and the remainder journey was 5 miles in the same tracks after  talking with my friend who also took 2 other routes said  only use junction 4 for coming to Henley  I think the CC need to make this very aware.

3 times I could of damaged my van yes I maybe should of read up on great detail 1 bit of information from the CC has 2 junctions on it????????? After hearing some of the current posts on the new CC sat nav which I almost bought I'm not sure it would of helped me either.