In the riwayat of hafs, you do iktilas in surah yusuf in the word ta` manna, someone was telling me ....

Question
In the riwayat of hafs, you do iktilas in surah yusuf in the word ta` manna,
someone was telling me that you do it twice one in surah yusuf and also do it surah baqarah ayat 185 in the word
`falyasum`. He said that when stopping on the word you have to do roum moving your lips forward like a circle.

Is this correct, i thought you only do it once in surah yusuf?  what about any other riwayat/qirat, do you do roum on this word?

Answer
There are two allowed ways of reading the word in aayah 11 of surah Yusuf, the first is by reading the with a shaddah and ghunnah and without making an extra sound after making the sukoon on the first of the shaddah, we make a circling of the two lips with NO sound of the dhammah which we make with our lips.  This is called .  The reason for this is that the word is actually with both having vowels, the first merged into the second, first by acquiring a sukoon, then merging into the second. 
The second allowed way of reading this is with of both with their original vowels, BUT we take off 1/3 of the timing of the vowel on the which has a dhammah (the first .  This is called ikhtilaas. 
So as you can see, ishmaam is when we make a silent circling of our lips, and ikhtilaas is when we read the letters with their vowels, but cut off 1/3 of the timing of the vowel.
The word is the only place in the Qur'an where Hafs 'an 'Aasim by the way of Ash-Shaatibiyyah has ikhtilass.
In the ten Qira'aat, all read this word these same two ways with the exception of the qira'ah of Abu Ja'far who reads with a complete idghaam with no ishmaam and no ikhtilaas.
Please see: http://www.abouttajweed.com/the-two-same-similar-close-and-far/the-two-the-same-the-two-similar-the-two-close-and-the-two-far-p-2.html

The use of Ishmaam is allowed on an word ending with an original dhammah when we are stopping on the word. 
involves stopping on a word with only 1/3 of its full vowel, meaning 2/3 of the vowel count has been taken away.  We can stop on a word which has an original kasrah or dhammah with any place in the Qur'an, with some rules involved.
Please see:
http://www.abouttajweed.com/stopping-on-the-ends-of-words/stopping-on-the-ends-of-words-1.html
for full details. 
The difference between and al-ikhtilaas is that is only on an original dhammah or kasrah on the end of the word and we are stopping on the word, and we "steal" 2/3 of the vowel length.  Al-ikhtilaas on the other hand can be on any vowel, in the middle or end of the word, and we "steal" 1/3 of the vowel length.
There are no cases when stopping with is mandatory for Hafs, but there are some cases where it is used to show the vowel on the last letter of the word when stopping.