Is that normal?

[Digifox]

For the last week i have been running my bike pretty damn hard and a lot further then before.
*No idea how many miles*

But i've noticed a few things that i didnt really pay attention to before.

Like for one.
Going around turns(like turning onto a street) If i kinda get on it the rearend will start to slide out from under me(almost laid it down in grove city)
this is really ANY time i get on it in turns~ Normal or just the POS rear tire?
(before i just thought it was from something on the road)

also once the tire gets sorta warm it loses nearly ALL traction, especially on the edges. Exp. when the tire is cold i can almost flip the bike backwards, but once its warm and try to do it it just sits and spins the tire

Cheng-shin tire BTW