No kidding.
Some of the worst examples I've seen have something go up to 0.9 then the dev realizes "oh sh!t I still have a few more releases to finish the story" and started doing 0.91, 0.92, then, "oh I think I'm half way thru the unfinished stuff now" and jump to 9.95, only to realize almost right after that "oh double sh!t I still have a ton more than I thought to go" and thus 0.96, 0.97, 0.98, 0.99, 0.99a 0.99b...
It would probably be better if people simply move away from version numbering, and change to use Episode ## or Chapter ## instead. To me at least that would be much clearer and more meaningful.