Not sure how using Runelite is considered a cheat client.
But anyway,
Regarding if my account is safe, don't worry, it's alright. As this all occurred during myself being online, with said items disappearing right in front of me.
These events were after the recent system and Runelite update. Both of which brought some bugs of their own.
Nothing confirming Runelite was to blame. But when I clicked to take my money from a G.E. sale, I didn't receive anything. Yet, it was still removed from the G.E. window, and confirmed in the transaction history.
I still do appreciate those that are giving theories.
19-Apr-2023 07:45:17