at that time,
The folly of Interpreters has been, to foretell times and things by this Prophecy, as if God designed to make them Prophets. By this rashness they have not only exposed themselves, but brought the Prophecy also into contempt.
Quite right, all those who have made predictions and timelines up to now, have failed and brought Bible prophecy into disrepute. This is very unfortunate and now most Christians just ignore the Prophetic Word, put it all into the 'too hard basket'.
However Daniel 12:10b says that in the last days, a few wise leaders will understand the prophesies. God has not given us so much information about our future for no reason and to ignore it is to downplay His Word and simply leaves us clueless about what will happen. Secular people seem to have a better idea of the forthcoming world changer and the prepping industry is booming.
Nobody knows the Day and The Hour of His Return [The Parousia].
Now I see what your real objection to #15 is. I don't know the Day or the hour or the week, month, but only the year, give or take 1 year each way. Is that a sin?
Matthew 24:16-24 is a passage about the Day of wrath, the Sixth Seal disaster, not the Return, that glorious event will happen exactly 1260 days after the AC desecrates the Temple. Revelation 13:5, 2 Thess 2:4, so at that time, Jesus' Return will be known to the actual Day.
We could go further but there is an error in your count between Jacob and Moses too, and I don't want to get into that.
Genesis 17:1
Abraham was 99 when the Covenant was made with God. That was 47 years after he left Ur in 1970 BC. The 2000 year mark since Adam.
Galatians 3:17
The Torah [the Ten Commandments]
was given 430 years after the Covenant.
430 + 47 - 1970 = 1493 BC, the date of the Exodus. As I have said, this date coincides with some dramatic cosmic and earthly events then. Also there are scholars who agree with approx 1493 being the Exodus. So you are 49 years out in your calculations.