It's the over-use of "......." that's confusing people. I don't know how much experience you have writing online, but seeing you didn't know what iirc meant, perhaps you're also not aware what the "..." is used for?
Writing "thanks for
caring..." instead of "thanks for caring." implies there's no finality to the thought/comment, and that one should read more into it. The fact you're also italicizing the word contributes to this perception.
It might not be easy to see at first, but when you write "That's
helpful......" this is likely how most people are reading it:
- That's "helpful" (sarcastic)
- That's helpful
(sarcastic)
Hope that clarifies why some people are confused.