Rendering Issues

I'm reasonably new to After Effects CC, and time to learn EVERYTHING in order to be self sufficient with AE  right now, is very limited with my work schedule.

I'm running Windows 10 and have five different templates I'll be using for five different pending videos I wish to create with AE. I've attached a screenshot of each composition in the render queue, needed in the project I'm currently working with. I have two questions along with explanations/descriptions of the why and how etc.

1. Re: OUTPUT SOURCE. As you'll see as per the first three compositions, they each have their own extension and folder to be saved to HOWEVER, my past attempts of rendering this project (I've restarted 7 times and same unwanted outcome) had me with 67 .avi files per composition. Keep in mind I have successfully rendered one full project into a movie but now, I can't remember how I did it all. So how do I create the correct output source settings so when it comes to rendering it (sending it to AME) I will have the movie I wish to have in one piece AS A MOVIE.. not 67 pieces or 'avi'?

2 The same as above, when I've saved the project then have the project sent to Adobe Media Encoder, I find all 67 compositions/layers render individually.. how and why does this happen and what can I do to prevent this happening?

I need to make 5 more videos over the next two days for work related matters but simply need solutions to the questions asked asap. Yes, I've done my research, and watched rendering videos but, none seem to be applicable to my situation.

I appreciate every ounce of assistance with this, thanks.