Just to clarify the RP25 standard, it came about in the early 1960s, when all HO rail was code 100, and mostly brass. Back when flex track and some switches had fiber ties. RP25 wheels operate without issue on code 100, code 83, code 70 and code 55 rail. The code 110 designation is new, to designate the difference between Proto 87, (code 88) wheels used in fine scale modeling.
So while Proto 87 wheels look better and are closer to the size and contour of the prototype, they are not intended for operational models.(Although some fellows do operate with them. (I think Scale Rails Rivet Counter Series come with Proto 87 .088 wheels). RP25 wheels work so much better on operational railroads. Pizza Cutter NEM standard wheels were common on Rivarossi and other European manufacturers back in the 60s and 70s, but by the 80s, even they were migrating to RP25 standard for product sold in North America.
Personally, I operate RP25 wheels on most of my equipment, and I use code 70 rail. I have minimal tracking problems, except for a few sprung Roundhouse and Athearn trucks dating back before RP25 was accepted.
For What it's worth, it may be your track, or the talgo trucked cars.