My CV went from 32 to 30.Why?

mods are only people, doing a volountary work - bundle list isn't updated 24/7 plus as they are only people they may miss something. If title is added to bundle list it will retroactively change CV of all bundled games to the point the bundle went live. So for example if bundle goes live right now, you create a GA for 10p game, while it's not yet bundle-listed, but already in bundle, and it gets added to list in 5 dfays, you will lose this 10$CV when it gets listed.

Best guess would be a game you gave away got bundled and suddenly wasn't worth full value anymore.

You can give away a recently bundled game that hasn't been put on the bundle list yet. If it was before it was bundled, you're fine, if not, your CV is changed accordingly.

One of the games you had givenaway wasn't on bundle list at time, but was retroactively added... As such CV is recalculated.

Thank you all for clearing this out for me!!

The total of your giveaways = $32.
The last two are from a newer bundle. When Coldfire Keep credited, it put you from $25 to $32 CV.
Since it's bundled, when it was updated, that dropped back down to $30.
However, that other $2 isn't actually gone. You can get the full CV from bundled games, it just stops contributing directly and instead will add in at 20% of the non-bundle/exploited list GAs you do.
So in this case, for that last $2 that dropped, if you give away a non-bundle game worth $10, you'll get that other $2 CV from Coldfire Keep as the 20% bundle CV addition, and end up having a total CV of $42.