Selected updates not installing

My Windows updates are set to download automatically. I receive notification of this so that I can select which ones to install.
My problem is that I select, close the screen, but when I reopen it it has reverted back.
Initial screen:


After selection:


After closing and reopening:


I've only just realised this was happening but it's probably been like that for ages.

I don't install right away. They're scheduled to install at a time when the PC is on, but I won't be actively using it.

I do check (or uncheck) the boxes and click OK. I don't do anything else on the computer. Like I said they're scheduled to install at a time that suits me when I know I won't be using the computer.
Installing in itself is not the problem. The problem is that it's not retaining my selections and installing what I want, or don't want.

There is an InstallNow button. Why? Why let you assume there is an option if there isn't?
I want my computer to work for me, not me work for it.

They DO install. Just not the ones I want to. For instance there is always an optional update for my monitor. I always tick it. I now assume I don't get it and never have, hence it reappearing. Likewise an 'important' update for Silverlight - which I got rid of long ago.
My point is if there isn't something wrong here, as nobody seems to think there is, why give me the option to select, then ignore it. Very logical.

According to people here the standard procedure is to install straight away, then, as above, why give the facility to schedule them?

That's exactly what I do. But if you look at the screencaps it doesn't keep the selections after I close the window. It used to work, I kept hiding IE10 and 11 and they didn't install. I closed the window then too and it installed corectly at the scheduled time. Now it installs what it wants to, not what I tell it.
I don't want to be forced into installing IE12 whenever it appears.