Home was built 1990
Our flooring was being installed starting in master bedroom then continuously out to the foyer and down the halls. We would like to continue down the hall and into 3 bedrooms.
The issue is once out in the foyer things are not lining up due to the huge house being slightly out-of-whack. We have an 1/8 inch gap on the one side of the stair rail and after going down the hall, the other side is going to have a gap of 1 3/8 inches. This gap gets wider as you progress down the hall due to the existing stairway. Any advice? Comments? I hope the photos show.
The photos may be mixed up. I put enough flooring without securing it in order to view what is going on.


https://photos.app.goo.gl/qUhiLD3ndnBaMGhh1
I placed boards down with no gaps in order to show where I need help.
Here is the gap of 1 3/8 and where I need advice
https://photos.app.goo.gl/iN4GDX4GF0OlpU5j1
This photo shows the gap has increased from 1 3/8 to 1 9/16 in distance of 36"
https://photos.app.goo.gl/WaeFFZvUXv2jF3xk1

Can you provide a diagram of the floor/room/stairs layout. Can't tell from the pictures where you are coming from or going to. The usual procedure is to do all measurements, baselines, and adjustment calculations before any flooring is installed in order to avoid the situation that you find yourself in. The reason is that most houses are not perfectly square.

You can always taper the flooring with either an electric plane or a block plane. With a beveled pre-finished flooring you will need to take several rows of flooring to achieve the desired results without loosing the bevel completely. At least you will not need to taper the difference over only three feet, instead of a 30 foot run across a large room.