How do I combine multiple projects into a single timeline in a production?

[318846478o6s]

This feels like it should be obvious but everywhere I've searched I've not quite a found an answer to my question. So apologies if this is. 

I've create a production with folders, including one which I've called SCENES which I've used to hold a number of projects, each with one sequence for each scene. 

I had assumed that I would be able to make a new project (e.g. FULL-EPISODE) in my production where I could combine all the finished scenes together into a single main sequence. And if I then made any further edits to a single scene, those changes would be reflected in the full episode main sequence. 

I've tried importing projects and draging sequences from projects into a new main timeline but if I make any further updates to those scene sequences I don't see those changes appear in my main sequence.

Am I missing something or is what I'm trying to do not possible? I just want a way where I can construct scenes and then combine them (maybe changing their order) and make further edits. I'm assuming Productions is the correct thing to use?

Thanks in advance. 

[R Neil Haugen]

Sequences are based within a project file's data. 

Most of us make a main Sequence project file, with most sequences in it.

For large productions, with several assistants or many episodes, they'll have projects per ep or something like that, and maybe have a Finishing project where they have their final sequences for polishing. 

But I, and most of those I know, wouldn't make a new project file for every sequence unless they were huge sequences.