This is likely a common glitch on mobile- GKC is known to be a little buggy when it’s not on a computer. If you want, you can email the Gimkit team at hello@gimkit.com to report the bug. Until then, you might have to just make do. Sorry about that!
Glitches when moving/erasing items - #4 by Haiasi
Selection Glitch - #8 by NavyCatZ
GimKit what happened - #6 by Haiasi
So yes, this probably happens to other people too.
Does that answer your question?