Looks like I'm getting the same results with Firefox on the same host PC as well.
Screenshot showing the same input values used as the one in your example:
Screenshot showing the same input values used as the one in your example:
My only advice I guess is to try it on a different machine when you have one available. Sorry, if this is a problem with the library I used, I can't really do anything to fix it. :/
(I say "based", I'm not sure just how much of their code - if any - you used. But you did compliment them earlier in this discussion)
If the issue is indeed with the library, there's little I can do.
I will still try to find what the issue is but can't make promises. Sorry for the letdown!