Trouble saving all sequences in one project
I have Pro CC 2020. When I save a project. Close project. Re-open Premiere, only one of the sequences open at random (for example Sequence3) and 1, 2 is missing. Unless I open up multipe previous files (because I tried resaving new files to see if this would work), then all the sequences turn up random order, some not updated, others updated. I've researched endlessley on forums, youtube, online and they don't seem to have a recent 2020 version video how to fix this. Other blogs and posts say to change the workspace layout, preferences options, double-click on tabs, but that doesn't work and most videos are outdated. I even desperately went to programs built in HELP and TUTS videos.
I want to know how to save / open a project with all the current multiple sequences, so when I re-open one project file - all sequences are there. I also would like to know how to back up my sequences in the project tab list, as all the sequences I was working on isn't listed or saved there. This is also at random and only seems to have one of the sequences in the list. When I try to drag a sequence from the timeline into the project tab, it just comes up as a timeline and not attached to any project.
Since I've updated to 2020 - this hasn't been intuitive. I was working on a 2019 file though and wondering if that is the issue. There is no crash problem. When I save or open the program doesn't crash or freeze. It is just the way it is saving. Any help is greatly appreciated.

