Q 1: I know that
Allah (Exalted be He) rises over His `Arsh (Allah’s Throne)
(Part No. 2; Page No. 386) above the seven heavens and that He (Glorified be He) is everywhere with His Knowledge, not Essence. However, I have noticed that some poems, which are sung on different occasions at the homes of many Muslims as Nashid (Islamic songs), comprise phrases that oppose what I just mentioned. An example of such phrases is: "Be sure that Allah is there but not in a definite place." Is such a phrase correct?
The phrase which you referred to in the question is false for it opposes what is stated in the Qur'an and authentic Sunnah (whatever is reported from the Prophet) to the effect that Allah (Glorified be He) is high above His Heavens; rising over His `Arsh and being distinct from His Creatures. Denying Allah's Loftiness is the false belief of Jahmiyyah (a deviant Islamic sect denying some Attributes of Allah, claiming they are ascribed to people and cannot be ascribed to Allah) and their followers.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.