I am actually getting 2 on my iPad as well. Same words, same order, for more than a week. Not even different questions for the same words. For example, It will ask me for the pinyin of 怎么样 but it will never ask to translate it, to choose the correct of mulitple pin yin, to choose the correct translation, etc.

Now, something that might be causing this is my review settings. I currently have rank 1 and 2 words set to 1 for both ranks, to strengthen new words.