Having some small amount of experience with Cartridges of the World and European cartridges, I would suggest caution when researching European cartridges and COTW. The well known, major cartridges are fine but, when you start looking at the odd stuff there is ample errors. That isn't an indictment of the reference work. Since Frank Barnes first put it together much knowledge and information has come to light on those old cartridges that simply wasn't known back then. The editors are attempting to correct the errors as they can.
When I started shooting 45 Colt, LONG AGO, none of the confusion existed. There was either 45 Colt or 45 ACP/Auto. That the other cartridges existed contemporary with the 45 Colt is indisputable but, only serious shooters of old revolvers and cartridges were aware of them and didn't confuse them. Today, as has been mentioned, there is so much less than accurate information out there that everyone with a smart phone and goober is an overnight expert.