racepak reading and msd grid

Working with TA/D team and have a question about timing. We have been told there is 5* loss in box. So to put it another way. When pulling timing we are seeing 5* difference in what timing should be. say 62* base pulling 15 should read 47 but not what we are getting. To the best of my knowledge, everything is phased in correctly, since I was told so and did not actually see the settings. Is this just a normal deal or we need to find out why.