So does that likely just mean it's a cable issue (i.e. the cable isn't transmitting enough light)? If so, great, I'll look at trying a new cable.
Give it a try without the sync cables attached to the strobes...ie take your camera out of the housing and expose the sensor that the FO cable fixes to...take a pic pointing your camera flash to the strobe sensors. Run your test again.
If you get the same results then you'll know for sure that it is not a cable issue or vice versa....
- JimSwims likes this