Your memory does serve you well. The 1998 versions, which as far as I know are the versions that have seen by far the widest distribution over the last 20 years, insert Sanctuary, Twilight Zone and Total Eclipse into the main tracklists of the first three albums, respectively (Sanctuary as track 2, Twilight Zone as track 10 and Total Eclipse as track 8).
And for those of us who got into the band since 1998, there is a very good chance that we became familiar with those versions of the albums, with those three songs added into the original tracklisting.
I get that, technically, those songs are not part of the albums as they were originally conceived and released. But for me, the only versions of those three albums I have ever known are the versions that do include those songs.
That's why I would have liked it if those songs, especially Total Eclipse, had been included on the newest remasters. Even if they had not been placed in the track order, but had instead been placed at the end, as bonus tracks. I bet there are a lot of younger Maiden fans for whom it will feel strange not to have them there at all.