Errors and Mistakes

[Freeray]

While looking through the detailed list of spells on the site, I noticed that a few of the new Time Mage spells simply stated that the casting time of the spell was "1 Action". I'm not sure if I'm just not familiar enough with DnD as a whole and I'm missing something, of if that was a typo. The spells in question would be:
24 Hours
Contingent Action
Corrode
Deja Vu
Past's Facade
Slow Skin
Switch Fate
Withering