salam
do the following invalidate salah
1) ive just realized that when i say salam at th end of my salah i am saying it like ''aslam alaykum'' instead of asalam mu alaykum
so im missing out the haraka on the letter 'seen' and saying 'aslam' instaed of 'asalam' and also not pronoucing the meem
would this invalidate salah
2) if you dont sit up properly after sajda before going back into sajda - does this invalidate salah
I try not to do this - but sometimes i feel like i dont go right back and then repeat my salah
3) does repeating surat fatiha again and again in one ruku invalidate salah
Asalaamu Alaikum, Correct pronounciation is very important as pronouncing a word or letter wrong may change the whole meaning of the verse. But it is not easy for many of us who's first language is not arabic but that does not give us an excuse to slack in learning the correct pronounciation.
It just takes some effort in devoting a little bit of time every week to read infront of a person who knows correct pronounciation who would be able to correct us and teach us the right way to pronounce the letters and the rules regarding correct pronounciation. So you should learn from this and make the effort in devoting a little bit of time every week in learning from someone who knows correct pronounciation.
Allah is most merciful so ask of Allah to overlook your mistakes and that you will make effort to correct your pronounciation for his pleasure and know that he is most merciful and generous and loves to give.
One should try their best to pray their salaah as near perfect as they can. You cannot do anything about your past salaah's now except ask of Allah to overlook your errors and mistakes (as i am sure we all have) and ask of him to accept your Salaah and worship and hope that he will. But you should ensure from now on that you try to do your Salaah as perfect as you can and then afterwards ask of Allah to accept it and then forget about it because it seems like you suffer from waswas that is why you are constantly repeating your salaah's and surah faathiha. This can make doing a simple salaah a very strenous and frustrating experience because you are listening to shaythan who is telling you that you did this and that wrong and you are accepting what he is saying.
So you must disregard shaythans whispers for he only aims to try and put you off worshipping Allah for he is the biggest deciever. Therefore you must pray the Salaah and know that ONLY Allah can accept it or not for shaythan has NO say in ANY of your worship. Once you accept this then you will conquer this waswas but until then you will keep suffering from it.
May Allah give us the ability to pray every Salaah perfectly. Ameen
And Allah knows best in all matters