Minecraft Alpha and Beta Skin Bug

(This is about versions Beta and Alpha but they didn't have it in the Affects Version/s part so I just put 1.7.10)
Recently, I really enjoyed playing Minecraft Beta and Alpha but there is one bug that annoys me. My skin is invisible and black and the screen looks messed up when I turn a certain way. My drivers and Java are up to date but I don't know what is causing this bug. People on reddit say it is a lighting glitch and other people don't have it. I have tried playing offline with the old launcher that uses a downloaded beta 1.7.3 jar and I don't have this issue. Is it that my launcher (the new current one, 1.5.1) messes up the installation and messes up my beta and alpha files? Thanks!