Home button not aligned after replacement

Hi, so I have replaced the glass of my iPad, and put it all back together. All was working fine, but the home button did seem a bit loose. One day it slipped inside the iPad slightly so you couldn’t press it.

I have now taken it apart again to try and refit it. Initially I didn’t have the plastic circular part that went round the hole of the screen where the home button goes, so have put that on. I can’t now get the bracket and home button to align so that when you press the button, it clicks. I can still click it with my finger however, so I know it’s not broken. Am I missing something, or do I just need to keep playing round with the alignment till it works?

Thanks,

Tom

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this is what I have at the moment. Does it look right?