First, welcome to CT! Second, would you mind posting a picture of the edge? It looks like somebody did this intentionally, but I would like to be sure.
Sure I will sent you picture now press the it you can see live picture if you want you can see in video call on my fb too I am just very new to this and I like it . I’m starting just last week
Welcome to C.T., Marites. I'm not sure what you mean by "extra tail." Also, the "E Pluribus Unum" appears correctly struck; what are you seeing there? Steve
Last week? you have so much to learn! I suggest you first educate yourself about the normal minting proccess and how coins are made. Then you can tell the difference when PMD - Post Mint Damage occurs. Your Nickel has circulation wear and tear. Look for How Coins are made on Youtube.