i am looking at nei that is what it says the recipe is. So what does your post mean?
The craft should be as follows:
Code:
[TIN] [HdG] [TIN]
[HdG] [Dia] [HdG]
[TIN] [HdG] [TIN]
What Abdiel likely meant was that NEI has it listed as the above, as opposed to what you were attempting to do. Abdiel had an extremely rude and not entirely clear way of trying to go about telling you this, but that appears to be fairly common when people ask a question others consider simple.
I do not understand your second question, as the only way I know how to make hardened glass is with an induction smelter.
Good luck with your tesseracts!