i have a scoutmaster/jmw9 combo. i've used a sumiko celebration and benz glider with it previously, and now im using a dynavector 20 x-l. i've had no problems tracking anything. my normal vtf is in the upper range per the suggestion of vpi, so the dyna i'm at 2.2 . the comment that the jmw9 is not a good tonearm is rubbish. it's very good, and is not the reason that you're mistracking. and you should not have to set vtf as high as you are. i would make certain that you're set up is spot on, particulary if somebody else did the initial set up for you. if you've never done this before, it isn't hard. i assume you have the vpi jig that comes with the table? there's loads of information on proper alignment here and on the vinyl area of audioasylum.com . also, make certain that your table is absolutely level. and make sure that azimuth is on as well, although this shouldn't have that big of influence on tracking. the bottom line is if all these things are checked and double checked and are perfect, then it's a cart issue and you may need to think about trying something else, although i too have heard that the blackbird is a good match for the jmw9.
good luck.
good luck.