Flex Grid Layout on 1600x1200 4:3 LCD Issues.

[Hobbyist]

I designed several pages using the Flex Grid layout. I am finding the pages during preview are not correct on a 1600x1200 4:3 LCD. Is there breakpoints you can recommend for 1600x1200 or 4:3? I am fairly sure the browser are up to date. Is there a way to correct this on the old 1600x1200 screen? I use standard 1080p 16:9 on my main computer.

[Pablo]

I do not think it has anything to do with the screen-size.
Maybe there is another conflict?
What is the exact problem?

[Hobbyist]

The items on the page do not "respond" to the screen size. They are way off of center when previewed on the 1600x1200 screen. The flex grid seems to work fine when I compress it on the 1080p screen. The 1600x1200 the sections and items in the grid are poorly aligned. I will grab screen shots later.Can you recommend me breakpoints for a 4:3 or 1600x1200 screen?

[Pablo]

To be able to help you I need to see what you have done.