I don't think your Crossovers are the problem... I have a 9 Track Yard on my Layout & have each track wired on both sides of the switches even though my switches are PECO Insul Frog's... I wanted to make sure my Loco's run through the switches with no problems...& I think your other problem is with your EZ TRACK I am assuming your using a Re Railer to power up your Track I would DITCH the current setup your using & wire you layout Direct & use a Transformer... If it was me I would Solder @ least 4 power leads to the main part of Layout & WIRE Both sides of your switches... & You should have no Running problems... MY Layout is 16ft long by 6ft wide.. & I wired my layout for DCC & believe I did my lead's every 2 -3 foot apart & all my switches in my yard are wired on both sides & each track is wired too.. Might be a little over kill on wiring but MY LOCO"S RUN SMOOTHLY with NO ISSUES....