Except that your result was now what I was trying to avoid, and which I did not instruct the system to provide...it was Bolded.
It seems likely to me that the undesired bolding is something that's happening on your end. This thread is a better place to explore that surmise than the Lounge thread, though. A couple of experiments come to mind.
First, I'll post some text which is italicized but not bolded:
This text is italicized but not bolded.Does it appear bolded to you?
Second, you should post a snippet of the text that appears bolded to you when you've only applied italic tags, and wait to see how it looks to other readers.