I'd have to say they weren't spooled properly...
Did you have the spool like this?
I find holding the spool with the label towards the reel helps to reduce line twist. Do 15-20 wraps and slack off. If the line goes limp, you're good. If it twists, you spooled in the wrong direction.
To correct your line, let the bare line all out behind the boat and reel it back in. If you're not in the boat, have your best friend go for a walk with it.
-Brian