Yeah, that's been happening for a bunch of people lately seems like Steam's activity feed shows screenshots based on upload time, not the order you selected them. Even if they’re in the right order on your profile or in the screenshot manager, the activity page can jumble them.

Sadly, there's no real fix right now. Best workaround is to upload them one by one in the right order with a bit of time between each, but yeah... kinda annoying. Hopefully Valve sorts it in a future update.

引用自 flingo：

Yeah, that's been happening for a bunch of people lately seems like Steam's activity feed shows screenshots based on upload time, not the order you selected them. Even if they’re in the right order on your profile or in the screenshot manager, the activity page can jumble them.

Sadly, there's no real fix right now. Best workaround is to upload them one by one in the right order with a bit of time between each, but yeah... kinda annoying. Hopefully Valve sorts it in a future update.

I tried uploading one by one too but still, in the activity feed, appear in random order... frankly I don't know what criteria Steam uses there because, if it's based on upload time, still there would be some order, but here it seems completely random. I'll try later changing the name of the files to see if it does a difference but... at this point I doubt it, because it seems like a specific problem of the activity feed only.
At least it's good to know that I'm not the only one, so I guess the fix depends on Valve only... thanks!

Yeah, a lot of people posted about, but Vavle ignores this problem they caused