"If on top of that, someone ceases..." or "If on top of that, if someone ceases"

[edinohio]

I have found both type of sentences:

1) "If on top of that, someone ceases..."
and
2) "If on top of that, if someone ceases"

However I don't know if there is any difference between the two. I personally don't like option number two. Could somebody explain what the second "if" is doing there? is there any difference in register? Is there any nuance?
Thanks
Ed