Let's face it: with the "exotic" markings and species mixtures that some fursuits have, it is sometimes very hard to get it right... even as an experienced and seasoned fur. There's just too much artistic freedom going around with some of the recent creations. Also, some specialized species based on games or anime series are not well known enough to be recognized by "the general public".
Add that to the fact that most people couldn't identify an animal in real life and you know why there's an abundance of wrong identifications. Eddie McBadger (who I spot for occasionally) keeps getting identified as a skunk typically, although he got all the typical traits right in the suit and no "hybrid" additions. People go with what they know: Black/white stripes > Skunk.
Bottom line: if it is important for the fursuiter to be correctly identified, a badge "Hi! I'm a _____" would be needed; otherwise there's always going to be some sort of confusion and while I undestand that that can be frustrating, I can't see a way around it.