DougK:
The problem concerns probably only minor marginal platforms such Apple, Mac, Android and so on...
Now seriously, I'm not programmer. My list is based on DataTables. I posted question about my problem to DataTables forum, but I don't have any answer.
The problem (bad sorting Waymarker column) is caused by complicated content (URL link) of this column. I have plan to divide this one column (waymarker name+URL profile link) into two columns - first (sortable) column will be simple waymarker name and second column will be (unsortable) column with URL profile link.
So, it will be OK, right?