Sounds jacked up after soundfont addition

So a few weeks ago, I uploaded a complete score of Mercury from The Planets, edited for the best possible playback. Over the last few weeks, I’ve been editing and updating it to sound better. Yesterday though, I downloaded a new Strings soundfont to make the strings sound more realistic. I added it, fixed the sounds for each instrument in the mixer, played it in the program, and it sounded beautiful. So I updated it on the website. But when I played it on the website, all the strings were jacked up. Their sounds had been replaced with a piano, and I have no idea why. I checked the mixer in the program again to see if I messed it up by mistake, but it was fine. And the playback on the program sounds perfect, but the website version has the strings with a piano sound. If anyone knows what might be the cause of this, I would appreciate some help. Also here’s the link if you want to hear what I’m talking about.
https://musescore.com/planet-bonezone/the-planets-suite-mvt-iii-mercury…