Scott, it still may be the T5 MFD. The S950 will substitute styles in the MFD in many instances, even though some may not be appropriate for the song selected.
I'm more thinking this has nothing do to with S950 substituting styles.
The fact that all the new specifically unique to Tyros 5 styles are missing from this T5 MFD's
File Contents leads me to suspect this MFD file wasn't created for Tyros 5 at all and may have been mislabeled & posted in error.
Perhaps Yamaha can clarify.
Scott