Hey! Yes, this is normal.
There may be a few images that cause confusion, and for many of these images the game will accept multiple rejection reasons before the 3rd night where it's officially defined. When reviewing the answers, though, it will only show 1 of these reasons. A lot of the clothed CDC images should still look sexual in some form or fashion, although a few may not-- it's not exactly perfect, but those images are very limited for those first two nights and is just another part of the reason why the game is more lenient on the answers themselves as opposed to the time it takes to answer.