They're all that way. It's okay.
Generally speaking, the top line [73-81 where a letter denotes the submodel] will always contain an S and not the V, W, X, or even T or U that you might be expecting if you were reading some incorrect trim tag decoder. There are many VIN and trim tag decoders about the internet that have copied each other with some misleading information. Ignore them.
If you want folks here to decode your trim tag, please do make a new thread in the forum.