After Greencard

I got my conditional green card in January 11 2018 and applied for the removal of condition in October 14 2019, I submitted necessary documents/evidences but USCIS still send RFE on November 2020 and I was called for interview on October 2021. I didn't get any news from USCIS and decided to file for naturalization this year June. I was scheduled for N400 interview on August 6 but I went there without my wife, the IO sent me back and rescheduled me for October 3 .I went with my wife and I was asked to sit outside while my wife was taking in for interview, after 25mins, my wife was brought out and I went in...I was asked same questions as my wife and the IO told me that my response tallied with my wife's response..The IO told me that he won't conduct N400 interview for me that day but he will approve my I751 and my N400 will be reschedule. Yesterday October 5, I got email that stated that "INTERVIEW CANCELLED AND NOTICE ORDERED ", this disturbed me through yesterday but this evening I got another mail that stated "CASE WAS APPROVED "...I really appreciate God for His mercy...