So…there is a sort order. First sort is by currency. Currency of the top 3 is “Belgium - Telephone Tokens”. Currency of the last 9 is “unspecified”. Within those two groups the sort order is by (first) reference.
The top 3 have Currency filled in “* Tokens * Belgium - Telephone Tokens” and that is an old system that is being phased out, from what Katermurr told me a few months ago. Once that is removed they should display in Unspecified Currency if the Currency field is set to Unknown.
I have submitted a request to change all three to unknown.