+xCould it be, that the bag is just damaged by the stretched spiral? Spirals usually have quite sharp edges. Some vacuum bagging films can easily be damaged by these.
try to simply plug the resin hose into one end of the spiral. This perpendicular connection isn't nearly as smart as it seems at first glance. The resin flows so much faster through the spiral than through the flow mesh, that the resin front isn't affected much by the asymmetric setup.
I will try your suggestion and let you know the results