S7S_Library_7.1.2.sib
This file should NOT be used in normal writing projects. It is for sampling the sounds only, review pages 11-12 of the S7S User Guide for more. Can also watch the video demo.
Sibelius_Sounds_Issue_Blank_MS_Sibelius_Instruments_added.sib
When using the default instrument definitions, use one of the default S7S sound sets. If you try to use the "S7S SoundSet 7.1a" file, you're very likely to get mixed results.
Sibelius_Sounds_Issue_S7S_Template_1a_MS.sib
This score plays back for me as I would expect it to. Are you using "S7S SoundSet 7.1a" for this? (The Staff Text "col legno" has no definition in the Dictionary and thus will have no effect - "col leg" is set to use the "Whole word".)
Questions on S7S_Library_7.1.2 second version.pdf
With "S7S SoundSet 7.1a" assigned to Sibelius Player, do the PlayTest files playback properly for you? Other than that, please note the sound variations from the PlayTest files that I've included on each stave. These are the sounds that have actual samples with which to playback. For all other variations that are possible and not specifically listed, Sibelius will do its best to "fake it".
Let me know how this goes.
Oh, are you using any other libraries besides S7S? If so, please attach a screen shot of your Playback Configuration.
Hugh