Yes, the duplicity is removed.
But this is not enough - see screenshots.
I believe, that the platform under the Hera has an high. And then it's possible, that the Soldiers spawn _in_ the roof and the program send they to the next level. If z reduce to 120 (8 is double wall strength), then the soldiers can fall on the bottom of Hera.
And yes, the fix working. I'm still playing this map at moment.
edit: in the old file are not really duplicity entries. At one charge is z=128 and the other has z=124. You delete the block with z=124
