I apologize for getting back to this so late. I stopped playing Blockland for a while. However, your pictures seem to showcase a different issue. I have no problem with the appearance of any faces or decals I have. However, if you actually are having the same issues as I have explained, I do have pictures.
Another round of apology that these are in url format but it's just easier that way. The pictures are large.
http://image.prntscr.com/image/f17856cc0b01400788f89389b9643528.pngDefault colors in the Color Set tab.
http://image.prntscr.com/image/430b28b76e29442bbf43599e2cce2535.pngI have added my color, the scroll bar shows it's there at the bottom.
http://image.prntscr.com/image/0d8ced5ccfab435db3e364c83fbc9b99.pngAfter hitting save my color is not there. I have no option to scroll, and where the color would be, there are the usual unclickable black squares. (This is present in the color options for all body parts except for the 'visor' color options)
http://image.prntscr.com/image/dc8c988385024decbfd56057f21d6687.pngBut there it is in my 'visor' color choices, as well as a few other custom colors I have tried to make.
http://image.prntscr.com/image/faa07e434bf642b7962ffe8d9718eef1.pngI have gone back in and made a larger amount of the color.
http://image.prntscr.com/image/5213c9b2bbfb4bcd80e9aa1d82cee427.pngAfter saving the mass of colors, still nothing.
http://image.prntscr.com/image/56d7a407e6344fb292c72b7c1e0276bd.pngBut of course the mass is present in the visor options.
http://image.prntscr.com/image/7021a91785a440319042ce6cc006bc68.pngNow I attempt changing a default color, the first red color.
http://image.prntscr.com/image/49232041050a4fe7b7d2a4f362bdb6fc.pngAfter hitting save, the red which would now be my custom color has disappeared. Though, the duplication of neighboring colors did not occur this time.
http://image.prntscr.com/image/0f24b4d598ad4eb1b5d60c5752c9850c.pngHowever, the replaced red appears as my custom color in the visor color options.
http://image.prntscr.com/image/29f443aeb34b4038a24f3b1744a341b3.pngFinally, I add a ton of the custom color.
http://image.prntscr.com/image/855d655146e34d1e92056bb68082127b.pngLike the duplication effect, the disappearing of most defaults and the inability to scroll did not occur this time. However, the ton of colors are there in the visor options.
I will restate and add though, that this is not likely an add-on problem. I have had this problem long before I knew how to use and apply add-ons. This has nothing to do with faces/decals or anything in the AvatarOptions
BUT the colors. This issue occurs no matter where I open the AvatarOptions menu. This is not a Steam related issue. I had Blockland before it was available through Steam (though possibly not this account, I had to buy it twice), I was not a Steam user most of the time it has been available and I do not have it linked with my Steam at all. Both purchases were made through the Blockland website.
Any and all Help/Feedback to correct this issue will still be appreciated.