It seems is very easy to submit a new coin to MapofCoins now, and probably the operators of that site are not being very careful to verify the data: http://mapofcoins.com/contribution
Edit2: Re-reading the topic from the CryptoNote forum (4th post). Spring 2013? Hmmmm...
Quote
The development of C++ implementation started back in Spring 2013 and was finished by Autumn.
I've never heard of buddhacoin before, so this mean Bytecoin was actually made in java? It could not have been launched in 2012 then unless they converted the blockchain thus making it look fake.
It means a Java clone of Bytecoin was created (for what reason is unclear), packaged up (most iikely with fake file dates and old libraries), and a bunch of fake "coins" and websites claiming to be from 2012/2013 were put up to again provide fabricated support for the "two years in the deep web" claims.
Bytecoin (and/or "Cryptonote reference code" as it isn't really clear which came first if either) was implemented from scratch in mid-late 2013, and released with a premined blockchain in early 2014. The rest is fake.