There look to be several differences between the two views in the screenshot below.
Are the gerber files created from Expedition PCB or from FablinkXE?
Which version is being used?
If you set the planes to 'Static' in Expedition, do the connections still look the same?
Is it possible for you to make the design available for us to investigate?
Please send it to me direct, or open a Service Request and upload the zip file to it.
I don't know what version of ExpeditinPCB you are using. There is a version on which thermal ties may be losted,especially you have edited the thermal width.
If you can't migrate to 7.9.x, just don't to try edit thermal width manully~.