javascript expert need

I quickly checked the console and see how the last array is storing info from the 2nd selection too. I can sort this out such that it only stores the final selection in the final array within 10 minutes. Kindly share with me the cPanel or FTP details to fix this for you!

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Dear sir/madam, Welcome to my profile. I can resolve this issue for you. This will not take much time for me to resolve this. Message me so that we can discuss more about this project. Waiting for positive reply from your side. Thank you.

Brother, I'll do it free for you. I am a full stack developer but just started freelancing so that's why i have to uprate my profile as soon as possible.

I have 4 year experience in Javascript. I think its an array concat issue. I can look into this and can fix this easily.