On the contrary, I'm willing to bet that it more than comes close to it. It is probably well into the weight range of his rod. As for the OP's issues, it's very unlikely you have your reel over-spooled. If you can see any of the spool's inside edge, you're fine. Flippin' and Pitchin' nailed a good part of you're issue. A rod that heavey, and that short, is going to have a lot of backbone and a very stiff tip. When you go to cast, to rod tip does not flex a lot, and therefor generates a lot of kinetic energy. When you reach the release point of the cast and remove your thumb from the spool all that energy is released into the spool. This means that you have a fairly thick ( .38mm for 17lb. Berkley Sensation) line trying like crazy to get out of it's own way on a spool that's spinning higher than any other situation you likely encounter. Since you are not used to having this high of RPM's, you have your spool tension set, as you said earlier, similar to all your other reels. You are also not used to thumbing this cast profile, and henceforth, you are getting backlashes. I would first decrease the Mag setting to around 6-7, and up the spool tension to where the lure just lowly creeps downward, or even does not move. Then, put less snap and more muscle into your casts, creating a smoother cast profile. This should calm things down considerably, and you can fine-tune from there. Another thing I personally would do is re-spool with some thin diameter line, such as Sunline Super Natural. It measures in at around .33mm at 16lb. test, the same as 12lb. sensation. If you want to take it a step further, condition the line with the line conditioner of your choice.