Wrong due date?

Dawn

My clinic told me my due date is October 13th, which would make me, according to glow 31.6 today.

But, another hospital told me if I'm 31.6 then my actual due date is Oct 11th according to their charts. Yet when I changed the due date on glow, it says I'm 32.1 today.

I am now lost on my due date. I'd prefer the 13th. But I should just go with the in between number, 12. And just try to measure in months.