Could be just about any thing, maybe:
- Because things pop up that DC wants to add/change while they work on other aspects of the game?
- Because the tech update is a complete revision of the code, and after they added a couple new scenes in the last pre-tech update they realized they need to tweak that revision more than initially thought?
- Because someone made a mistake in their current work they thought was done, but now need to fix that?
- Because shit happens and you adjust, accordingly?
Last pre-tech update was less than 2 months ago - based upon the update history, the next update isn't for another month or 2, at least. You've known the situation from your previous posts in this thread on the same topic in September, October, November, and February. Breathe, relax, go do something else for awhile until later this summer for your next complaints.