Okay so I looked the verse of Mukahamath and Mutashabihat, and for the Mutashabihat it says only Allah (swt) alone knows it. However, the 12er Shia appear and still say the Imams know it. If this is the case why doesn't the Quran just say the 12 Imams know it as well?
هُوَ الَّذِي أَنْزَلَ عَلَيْكَ الْكِتَابَ مِنْهُ آيَاتٌ مُحْكَمَاتٌ هُنَّ أُمُّ الْكِتَابِ وَأُخَرُ مُتَشَابِهَاتٌ ۖ فَأَمَّا الَّذِينَ فِي قُلُوبِهِمْ زَيْغٌ فَيَتَّبِعُونَ مَا تَشَابَهَ مِنْهُ ابْتِغَاءَ الْفِتْنَةِ وَابْتِغَاءَ تَأْوِيلِهِ ۗ وَمَا يَعْلَمُ تَأْوِيلَهُ إِلَّا اللَّهُ ۗ وَالرَّاسِخُونَ فِي الْعِلْمِ يَقُولُونَ آمَنَّا بِهِ كُلٌّ مِنْ عِنْدِ رَبِّنَا ۗ وَمَا يَذَّكَّرُ إِلَّا أُولُو الْأَلْبَابِ {7}
[Shakir 3:7] He it is Who has revealed the Book to you; some of its verses are decisive, they are the basis of the Book, and others are allegorical; then as for those in whose hearts there is perversity they follow the part of it which is allegorical, seeking to mislead and seeking to give it (their own) interpretation. but none knows its interpretation except Allah, and those who are firmly rooted in knowledge say: We believe in it, it is all from our Lord; and none do mind except those having understanding.
[Pickthal 3:7] He it is Who hath revealed unto thee (Muhammad) the Scripture wherein are clear revelations - they are the substance of the Book - and others (which are) allegorical. But those in whose hearts is doubt pursue, forsooth, that which is allegorical seeking (to cause) dissension by seeking to explain it. None knoweth its explanation save Allah. And those who are of sound instruction say: We believe therein; the whole is from our Lord; but only men of understanding really heed.
[Yusufali 3:7] He it is Who has sent down to thee the Book: In it are verses basic or fundamental (of established meaning); they are the foundation of the Book: others are allegorical. But those in whose hearts is perversity follow the part thereof that is allegorical, seeking discord, and searching for its hidden meanings, but no one knows its hidden meanings except Allah. And those who are firmly grounded in knowledge say: "We believe in the Book; the whole of it is from our Lord:" and none will grasp the Message except men of understanding.
[Pooya/Ali Commentary 3:7]
As explained in the commentary of verse 2 of al Baqarah the Quran was revealed to the Holy Prophet. He knew the true meaning of every verse, or after him, it was Ali who claimed that he knew when, why and for whom every verse of the Quran was revealed.
Most of the verses of the Quran are clear and decisive. There is no ambiguity in them. They are known as the muhkamat. They relate to the fundamentals of the faith, such as the oneness of Allah, the directions pertaining to the practice of the faith and the laws governing the day to day life of the faithful. They can neither be changed nor modified. Any man of average intelligence can understand and follow them.
The mutashabihat are the verses which have been composed in subtle and profound diction and style. They carry implications other than the literal meanings, and therefore, are capable of giving different significations, like "The hand of Allah is on their hands" in verse 10 of al Fat-h. Verse 1 of al Hud says that the Quran is a book of clear and decisive verses. Verse 23 of al Zumar says that Allah has sent down the very best discourse as a book conformable in its repetition and consimilarity. Only the men of understanding who possess a higher level of intelligence contemplate and find out the meaningful implications of such verses. Average and ordinary minds cannot figure out or have knowledge of the real purport of such verses, and if they try this on their own, they are bewildered and go astray. As mentioned in the commentary of verse 1 of al Baqarah, the huruf muqatta-at are also meaningful but their subtle and profound meanings are known to Allah and His chosen representatives (Muhammad and ali Muhammad) only. Therefore, those who know the true purport of these symbolic letters occupy the highest position in the domain of knowledge and wisdom. In the well-known tradition of thaqalayn the Holy Prophet has clearly made known the fact that whoso remains attached with the Quran and his Ahl ul Bayt, after his departure from this world, will never go astray, because these two weighty authorities will never be separated from each other, and joined together, they shall meet the Holy Prophet at the spring of Kawthar; and "I am the city of knowledge and Ali is its gate", said the Holy Prophet in order to guide the faithfuls so that, to have knowledge of the Quran, they must refer to Ali and his Ahl ul Bayt, who alone know the true meanings of the mutashabihat.