You’re probably using the default settings in Anki, which will show you each new card twice when you first encounter it. To change your options to the ones we'd typically use, click on the ‘Gear’ icon to the right of any of your Anki decks and select ‘Options.” Then change your settings to match these:
Note: As of September 12th 2019, we no longer provide official support for our Anki based pronunciation trainers and word lists. You are more than welcome to still purchase and use them, but the support we are able to offer for these products is limited. For supported languages, these materials are already built into the Fluent Forever app.