Flex metal ferrules don't fit FID port

I have the flex metal G3188-27501 ferrules. when it comes to the Inlet, the ferrules fit alright and I can tighten them onto the column. When it comes to the FID port, the ferrule is too long and I can't screw in the column to the outlet. If I really press the screw end in, I can make it barely catch the threading but if I start to try to tighten the screw and squish it onto the column, I can see the screw tilt, risking cross-threading either the screw or the FID port. I have no idea why it's like this but I end up having to switch to graphite ferrules just for the FID port. Is this by design or is something wrong?

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