Illustrator :: Entering Numbers In For Location / Opacity And So On

When I try entering a X/Y coordinate or enter the opacity number, when I try to type example 58, I type the 5 first then the 8 but it types it in as 85 putting the text infront

Also, when I type in the coordinates and want to delete the decimal place example, 23.756 to 24, I try clicking in the place and hitting backspace or highlighting the 3.756 and entering 4, it will hurry and highlight everything so when I backspace it delets all or when I enter the 4 it will highlight all and put the 4 so my object flys to another part of the art board.