Posting your solution

 Just a quick note to those of you who are new to this, you should post the entire decrypted message in each box on the submission form, not just info about how they were enciphered. In fact the decryption is the only thing you should enter and this should not include the date at the top of the messages on the pdf. The dates are just there for context and will throw off your answer. (The numerals will get deleted by the solution checker so they are not the problem, but the month will stay in and will confuse the checker, which is a meerkat (albeit a highly trained one) and therefore likes to keep things "simples".)