The problem is that you are puttin your fishing line on your reel wrong.
Here is a good tip:
To alleviate the problems of line twist on your spinning reel because of fresh line, simply take your spool off of the reel and run it under your hot water tap for 2 to 3 minutes. This changes the memory from the manufacturer's spool size to your spool size. This allows longer, smoother casts with less twists and knots.

Or just check this site out this also helps with the twisting in line which leads too lots of slack in the line and lots of tangles. http://www.wikihow.com/Spool-New-Fishing-Line-Onto-a-Reel

I had the same problem with my spinning reels too, but there is a right and wrong way of doin it. Hope the info helps.