A similar problem that I have had is the following:
In PADS Logic, I change the PCB Decal of a part. Then I open the PADS Layout Link tool by clicking the "PADS Layout" button in the main toolbar. I click "ECO to PCB" and then PADS Layout has all my components, but the decal changes are not transferred.
If anyone is having this problem, the fix is as follows:
In the PADS Layout Link box, switch to the Preferences tab, and select the checkbox "Compare PCB Decal Assignments". Now go back to the Design tab and click "ECO to PCB" again. The decals should now update.
Alternatively, you may wish to change the decals in PADS Layout, not in PADS Logic. In that case, uncheck the "Compare PCB Decal Assignments". Now go back to PADS Layout, go to the Tools menu and select "ECO options". Now deselect the "Output Decal Changes" checkbox. You should now be able to edit decals in Layout.