I reposted a few tracks recently to my account TheJinLee. But, only a very few of the reposts show up on my profile! This should be a very fundamental QA test cmon soundcloud. This is reproducible on Desktop (Chrome) as well as IOS 11.0.3.
Best answer by Rhythmicity
This is a known issue; they're currently working on a fix.
The "main" thread: https://soundcloudcommunity.com/desktop-230066/reposts-don-t-work-7385160