What exactly does happen? The atty is at bottom of carto then theres the tube in the middle with the wire running inside and outside of the tube is the filler. Where is the liquid vaporized on top or bottom of carto? When feeding from bottom does juice go up to the top of the tube or does it fill from the bottom up? Sounds stupid but I don't know or really understand how carto works. Thanks.
When you initially fill the carto. The filler will be wet but it takes a little bit for the juice to spread throughout the cartomizer to the point where it can get the diapers wet. To clarify what the "diaper" is. It's the piece of cotton that is wrapped around the coil. If it doesn't stay wet and gets dry. It's the first item in your carto that is going to burn regardless if the filler is soaked in juice or not. Also, it's what supplies the coil with juice to burn which will effect the taste that your getting from your cartomizer. If the diaper is burnt. Than you will either notice that it doesn't taste as good. As when you first filled it and also, there will be a SLIGHT taste of a burnt flavor. A lot of people don't usually notice this but, that's when I usually dissect my cartomizer to confirm my suspicions. Ultimately, it's the reason why it's important to let your carto sit for a few minutes after 5-10 hits.
As for the atty being on the bottom of the carto. That's only true if it's a horizontal coiled cartomizer. Since your using a Boge LR which is a vertical coiled cartomizer. Meaning that the coil is in the middle of the tube of the cartomizer. While the filler material is surrounding it to ensure it's being fed properly. Also, since the coil is connected to a wire that runs throughout it. The way I think about it....logically the wire is going to get hot as well since the heat is spread from the coil to the rest of the wire it's connected to. Personally, I don't fill it to the very brim where the top of the carto is soaking wet. Which means that you have basically flooded your carto. But, I do like to see some color on top where I know that it's filled all the way through. That's when I notice that I get the best flavor and vape from my carto.
As for your second question. It's getting vaporized from the middle since that's where the coil is located at. The top where the wire loops around and goes into the filler material gets pretty warm but it's gravity itself that draws the liquid down to the middle of the cartomizer. This is supplementing the loss of liquid in that area. Which is why you will notice that the top of their carto gets dry first.
For your third question, it's going to be filling from the bottom up. Since that's where the liquid comes out of the feeding tube/510 connection. When I use a carto on my REO. I simply don't treat it like an atty. My blind squonks are slightly longer which allows more juice to go throughout the carto. Usually a second or two followed by a few (3-4) dry hits to help pull the juice from the bottom to the top of the carto.
I am by no means an expert on cartomizers but, this is what I learned from personal experience. Hoped I helped a little bit and if you have anymore questions than ask away.
Finally, no...it's not stupid at all. Without asking questions....it makes it extremely hard to learn anything.