ISSUE Need help with repair

[GalaticFartic1159]

I'm finishing up a steering column swap on my 1993, the column I'm swapping in is from a 1992. Physically they look identical to one another, but for some reason I cannot for the life of me get the intermediate shaft back on, it physically doesn't fit. I don't get why, because as I said the coulms look exactly alike, are the intermediate shafts different?

 

[franklin2]

The double D shaft or the splines at the steering box?

 

[GalaticFartic1159]

The double D, it seems too large to fit on the bottom side of the shaft, bottom being the flat end not the rounded end