however there is L2 for May 6
I'll notify the web admins of the problem. Try your query again tomorrow.
If I use the file search tool I can see all the files without a gap, but there are gaps with the L3 browser or the direct access https://oceandata.sci.gsfc.nasa.gov/VIIRS/Binned/Daily/SNPP/2017/
In the direct access the file dates are steady to 5/20/17 then they jump to 5/30/17. Maybe the files are around (the file search files them) but they haven't made to to the direct access area or to where the L3 browser looks.