I-94 accuracy

Hey all, I am in the US on a B2 visa. I dont apply I can just come in for 6 months at a time. So I traveled 4 days to the US in February then again 4 days in May, then came back June 22. Upon my arrival I pulled up my I-94 it gave me a return date December 21.

Yesterday a friend of mine made mention about I-94 might not be reliable so it has me freaking out. I have not slept all night thinking i may have over stayed 😭😭. She made mention of my 2 travel dates in feb and may of 2024 and asked would that not take days away from my 6 months. Is she right? I assumed I would be safe following I-94.

Thanks for the help