>>42552464
In the image you've posted, her tail looks more like Tails'es two tails than horse-hair. Trixie's tail-shape is a bit odd in general. In the show, it has 3 points, but is mostly one strong central swoosh. Flawless is supposed to have trixie's tail-shape, but with different coloration.

So, for shape, it's depicted off-model all the time because the whole show is off model all the time, and the shape is particularly difficult to remember in detail in the first place.

So, because people like symmetry, they just match her tail hair to her face hair in their own incomplete memories without ever realizing they have done anything wrong.

For color, there's a similar explanation, except one might logically assume that they simply can't see all the colors of the tail from particular angles. So the colors have an extra excuse.