Display & Nav problem

[ideoplastic 86]

I am sitting on rwy28R at KSFO I open the FMC on PMDG/Level-D and start entering FP data, then when I enter rwy28R on DEP/ARR andexecute the rwy appears on the display at a 15 degree angleto the true runway. 265/85 degress instead of 280/100. Earlier today during VATSIM flight KSFO-KSAN and descendingfor the approach ATC gave me hdg130 and after entering it on the MCP ATC told me I was 15 degress off course and therefore hadto enter hdg145 to compensate. Yesterday also during MaiquetiaEvent and on ndb approach to rwy28 the runway was not displayingcorrect orientation by 15 degrees. Funny thing is not all airports display incorrectly. I am using AIRAC 0503Appreciate any advice/feedbackThanks

[ideoplastic 86]

Here are some images.One at KSFO showing rwy28R deviation display, the otherEGSS showing correct rwy23 orientation.Would be grateful if someone with Level-D or PMDGcould check 28R KSFO to confirm if this problemonly affects me or everybody. Any feedback stillvery much appreciated.Thanks

[ideoplastic 86]

A kind colleague at VATSIM advised me that the runway misalignment problem could be due to adamaged magdec.bgl. In my particular case itwas actually missing, I guess accidentally deleted.Thought to post this info for everybody's benefit.Thanks