So, are you saying that every other person received a 1099-S with their portion but you received a 1099 with the entire amount?
You only have to report your portion. If you only received a 1099-S, you could nominee the rest of the sales price to your co-owners, but if everyone got one, you can't do this.
You should reach out to the agent who handled the sale. Everyone should have only received their portion of the amount.
Nominee