I have tried annotating PDFs in Logseq 4 times and every time I've lost my references

So, I need help with best practices in PDF annotation.

There seems to be a duplication problem. I have multiple copies of the same file in my Asset folder. Not sure why this is happening. Today I had to force quit Logseq in the middle of annotation and when I reopened it I started getting the error message “wrong file path” or similar. I had annotated more than half of the books and I’ve lost it and there are multiple copies again.

Am I doing something wrong or is it normal? Attaching the SS of the Asset folder.