I'm sure next time will be better.
The pictures are shifting according to what screen do you have or how big Skype window do you have if you didn't stretch it in full screen. The pictures are also shifting and changing size according to how many people is there in session and how they come and go. As people came into conversation the pictures became smaller and only of that one who was talking was big (on my tablet really big though).
I'm not sure how's with names but on my tablet I've got the names under the picture of the person who was talking at the moment and it also was blue line under the picture of that one. With Beth, who didn't have camera switched on there was blue circle around the icon of her acount in addition to blue line under her window when she was talking though.
Margaret was only half visible almost for entire conversation but it was due to the position of her camera and not due to Skype things.
Phillip was visible all the time through the conversation although you've said twice in the conversation that he's gone. I honestly don't have the explanation to this though. All the rest was as normal as always.
Margaret had the interesting situation also saying that you appeared twice on the screen but this happens if you leave current Skype conversation window no matter that window is still visible on the screen what means she was practically on desktop with Skype window visible behind that small window which appears if you leave the main stream window. This happens in order not to loose track when you're not in the main stream but rather doig something else like searching for a word in the dictionary (as it probably was in this case).
Every single change or navigation away from the main stream window or changing the size of the main stream window will cause shifting of pictures of participants and also the position of messatge window if resizing.
Hope this helps to understand why some things happen however you don't have much influence on this but get to be used to such sudden and a bit unexpected changes for that matter.