Misleading ad

I am currently a dstv compact subscriber @ R365pm, I pay the R85 additional fee monthly for xtra view/pvr usage. I recently saw an ad advertising dstv compact @R460 with a saving of R95 off the original subscription price. Meaning the subscription should be R555 this is somewhat misleading as the current cost for dstv compact plus is R489 and that means a saving of R29 maybe my my calculations are out but I would really like to know how the saving of R95 was calculated?