I fixed it! I loosed the track on the curve and let it take up its' own natural position. It's hard to explain but when you bend flextrack, I guess you can bend it even or uneven. It certainly looked even. Apparently, a section of that curve was not acceptable to the engine and consist. After letting it reposition, I took some small nails and nailed them in a couple of place outside the ties on the curve to hold it in shape while I ran the consist around again. Walla, no problemento. That's Spanish and means all when well. It must be heart wrenching to glue your cork roadbed and track and then have the problem I did. I guess I will nail mine in place before gluing it permantly. How do you all avoid this problem?