To the person, who has recently uploaded the Arrange sets and all of the Kevin sets:
It is clearly stated at the submit form of this site, to "Not upload the levels, you don't own the rights to".
Only Kevin B Reilly can submit his sets (and he of course didn't do that). And the authors of the Arrange sets can upload them.
This is important, because Kallmark's Sokoban for Windows is not freeware. Since any submission of levels is therefore a part of the monetary transaction, someone is making money with levels, which were done for free and were meant as freeware.
It is not a nice thing to put freeware levels into the non-freeware program (and the authors of the levels know nothing about it). Please avoid doing this in the future.
If would be a different thing if the program would be freeware (or if the site would simply host levels with no program). Then we could just port around 40.000 new levels into it. And even then we would have to inform the authors about it.