We have made major improvements to pasting lists functionality in Q1 2013 release. We have covered the main lists styles (circle, disc, square, decimal, alpha and roman) except "list-style-image".
MS Word, however, provides list styles which do not have an HTML and CSS analog.
Currently, the RadEditor list's converter does not take into account the list's items numbering. This numbering can be achieved by setting the list's start
As far as I know the start attribute accepts only integers and there is no way to be handled the provided case.
I have logged your feature request, you can track its status, vote for it and comment it via the item in the Ideas & Feedback portal
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