Mordred

Pretty good what's the new method for posting latex for some reason all the [math] instructions I had in my last post disappeared 

Oh, I see. If you don't edit quickly, sometimes the software backend seems to parse your latex before you're finished editing and you get all the super and sub-index structure flattened out. It's happened to me before. The longer you spend editing your post, the more likely it is to happen. I don't know why that is. But it's not due to LaTeX-editing rules having changed, AFAICT.

Could that be down to an overarching  timeout editing control.  I think it's currently about  30minutes