Hi,
this sound to me like a very common mistake, many of us made before.
To make changes to the rigging of morphs in DAZ permanent, you have to do the so called"Erc Freeze".
This will "bake the rigging to the morph".
If you will do a Goole search "erc freeze" you will find several hits, including this video (I took quick a look at it and it seems good)
To verify if this applies to your issue, please do this test:
close and restart DAZ3d and apply your previously created morph to a G2 figure.
Has DAZ3d still "remembered" your changes your made to the rigging?
If you don't do an erc freeze, DAZ will keep the changes only till a reeboot.