I haven't posted here before because this is a really technically aspect of forum so if this is the wrong place to ask, I will still be happy if am corrected
This is the place to ask your question, buddy. However, I haven't seen any technical questions about the forum posed here. Every topic brought here is mainly concerning the forum, such as problem fixes, challenges, thoughts on the forum's progress, proposals for adding or changing features, and so on. So your inquiry has been directed to the appropriate place.
You cannot find your thread because it was deleted by moderators. When a thread is deleted, it is removed from the forum without notifying contributors.
When you say that the original contributor of a thread deleted by the moderators will not be notified, that sounds a little unclear to me. Is this limited to the original thread only? Because I recall 2-3 of my posts being deleted when I was still learning how to use the forum, even though they were replies to other posts and I was alerted about it. Could he have missed the message because it was an original thread rather than a reply to his? I'd like to understand more.