Hello, just so you know, you did not create HeadOn properly. The section goes on top, the picture on the bottom, and an SVG needed tag under it. No description is particularly necessary, but it can be there. I realize you are trying to help, but please look at the page to remember this format for the future, thank you.
Hi, word of advice, you shouldn't really use the forums to ask questions. I realize you are trying to help out here quite a lot, so in your case I would prefer you asking me or another administrator and we would be more than happy to help. The reason I say this is because the forums are mostly used for spam if you look through and we know you are not a spammer.
Hello, I would like to inform you that you should not use thumbnails for pictures on Logopedia. The proper way to do it is [[:File:Example.png|center|200px]]. The size should usually be 200px, 250px, or 300px. Thank you.
I do not really think you need a size for galleries, I personally prefer three images in a row. What bothers us about thumbnails is that usually users just use them because it is automatically set to the visual editor for users and some are lazy. But I realize you have good intentions, so just remember not to use them in the future. Thank you.