Congrats! If anything, I'm sure most schools will be more impressed that you wen't from a 144 to a 160. It shows that you had a goal in mind, and busted your butt to reach it.
I went from a 144 (yea that bad - DEC '14) to a 152 this past test... I think I can improve even more - is it worth taking once or twice more if "set" on going to Law School to get the highest score possible??