Regular and SemiBold weight cancel each other out as duplicates - how do I fix this?

The most likely problem is the fonts have a glitch in their naming tables -or there is a glitch in how the operating system or software application is interpreting them. For whatever reason computer operating systems (such as Windows) still prefer to regard fonts as having four styles (regular, italic, bold and bold-italic). Modern type families often have more styles, dozens upon dozens more in many cases. But this groups of four thing is still lurking under the hood. If one of the styles, such as Bold-Italic, isn't grouped correctly in the tables the font can be out on its own and potentially be cancelled out by other styles due to a conflict.

It's possible to fix some of these glitches using font editing software or even a font conversion application like TransType 4. The app can show these style groupings, show any individual fonts orphaned on their own and allow them to be properly re-organized. Generating new copies of these fonts can be tricky if the files are complex. I tried fixing one of these kinds of style errors in a type super-family called Vito using TransType. I fixed the style conflict in the generated copies, but then the new files had issues with the numerator and denominator number sets (fractions were messed up).

Another possible culprit is having two type families with very similar names installed. Century Gothic is a common system font in Windows. It could be possible the Paneuropean version is fighting with the version bundled in the OS.

Contact the font author and ask them to fix it.

https://www.cufonfonts.com/font/century-gothic-paneuropean

Hello @SerraSemi,

I am sorry to hear about your experience. Would you mind checking if this happens with other non-Adobe applications as well? If yes, try removing and reinstalling the fonts to check if it helps.

Looking forward to hearing from you.

Anubhav