No. ten hundredths and one tenth are the exact same thing. This is why I wrote in the bugfix decimal place to illustrate how it deviates from mathematical values. It isn't one tenth, it isn't ten hundredths, it's the tenth major update of the first (zeroth) edition, aka the alpha/beta release period. X.Y.Z, where X is major editions, so 1.0.0 is a "complete" game; Y is major update to the current edition, so it could be 0.3593.0, even; lastly, the bugfix numbers, where nothing major changes in the content or form of the product, but bugs have been squashed, like what happened with Perverteer's
Sisterly Lust going from version 0.21 to version 0.21.1. "bugfix numbers" is also a little bit of a misnomer, because it can be for any minor update, really, but primarily it's used for bugfixing.
Each version step is an iteration within the former version step, so you could have 0.3593.985 if you really had that many major releases and that many bugfixes specifically released on version 0.3593, and version 0.3593 might be 1% of the total game, or it might be 99%; the version number holds no percentage equivalent for the total completion of any particular edition. To reference Sisterly Lust again, Version 0.21.1 is pretty close to the end of the game, with version 0.22 being the last of the day-to-day content, and after that the epilogue, and then a once-over to catch any other problems and do some bugfixes and then it goes to version 1.0.
Another way to look at it is that it's just a slightly formalized way of writing it out in shorthand; instead of having to write out "zeroth version, 10th major update" you can just write "0.10". And yes, if there aren't any bugfixes or other minor content releases for a particular version, then commonly the bugfix place gets dropped (until needed).