I suspect most of the majority texts were written between 95 AD and 1450 AD...
I think it is simply a typo, the author must have meant 1450 BC - 95 AD. You always start with the earliest date (you do this yourself in your reply), thus 1450 AD - 95 AD does not make sense. I would also say that all of the OT books were written a good bit before 95 AD, even the oldest extant, the Dead Sea Scrolls, were almost all written before this time. Plus, we do not have any complete NT texts dated 95 AD.
P.S. Even if the earth would be slightly pear shaped its round cause you can go round it.
You can go round any shape at all, you can go round a square if you wish. But Isaiah was specifically talking of the Earth being a circle, and in keeping with the flat Earth promotion in the Bible, this circle would have been flat, like a CD or DVD.