we are still considering what the filename should be moving forward. Traditionally, nightlies only show the major version (in this case 10-date) not major-minor-date (10.1-date). Release versions traditionally show major-minor-sub (9.0.1, etc).
That said, we understand the confusion, so yea, we are still considering what to do. Luckily, mako and manta don't have an issue, so we bought ourselves some time :)