The JB Hollowcore is notorious for exactly the type of twisting you describe. There was probably nothing wrong with what you were doing, but you may want to double check your Line Roller Bearing to make sure that it is spinning freely while under line tension. It is the nature of all spinning reels to twist your line; the flat hollowcore just accentuates the twist more visibly than with a round line.
When i used to run JB hollowcore on my spinners from the shoreline, it really cut down on my distance on the long rods once the twist got bad enough.
