After 147 years, slavery abolished in the U.S.!

BIZARRE!

The state of Mississippi ratifited 13th amendment abolishing slavery, only 147 later! Originally the amendment was supposed to be valid from December 6, 1865 and gradually all of the 50 states were to sign it. Mississippi rejected it but later on, in 1995 they approved of it. So why wasn't it valid from 1995?It is more than easy, until February 7, 2013, they had never submitted the required documentation to ratify the 13th Amendment, which means it never officially had abolished slavery. That is more than bizarre I would say.