As I thought, you've run into encoding issues. 'BasicSet-12.htm' shows no ligatures at all in Firefox, and looking at it with a hex editor shows that your ligatures have been transformed into garbled 3-byte UCS-2 surrogates.
I can only recommend that you follow the advice I gave yesterday and use explicit escape codes rather than trying to paste in characters and hope they remain intact across all those hops.
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