The development team is in the process of rolling out a hotfix which addresses a number of bugs with the Deck Manager. Here is a quick list of items that have been addressed:
Deck Manager: Trading away a coin that has been selected for a saved deck no longer prevents a user from selecting a new coin.
Deck Manager: White Kyurem EX, Black Kyurem EX, or Black Kyurem no longer have missing text in the Deck Manager.
Deck Manager: Zooming in on a card while in carousel view no longer skips to a random card after zooming back out.
Deck Manager: When adding or removing cards from your deck in All view, the Pokemon is no longer deselected after clicking the + or - button.
Additional Deck Manager bug fixes and tweaks based on community feedback will occur in future game updates.