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...to the OP. If you have enough OCD that this continues to bother you (unlikely), it is probably possible to order a Phil Wood bottom bracket that will fit the crank you have installed (which you have as yet not named). The installation of those allows a side to side adjustment of several millimeters, using the Italian installation rings (separate purchase). They are much more expensive than what you have installed now, and require a proprietary installation tool. They do last a long time, and are of high quality.

Or you can look on Velobase, for the crankset in question. That might (or might not) tell you if this particular Campy crank requires some sort of special asymmetric spindle unit, which you might (or might not), be able to find available for sale with an internet search.

I have installed, reinstalled, and retrofitted dozens of older Campagnolo cranks. I try to do it correctly, and as I stated before, I don't think your repair is problematic. It does change the "Q". Apparently I am not bothered by that as much as some others giving you advice. That's about all I can tell you, other than threads like this tend to drag on, based more on differences of opinion on what is "right", than any practical concerns. Enjoy your bicycle, that's a lovely yellow color.