so i had 100 cp160 purple glyphs and when i decon them not 1 by 1, but using ingame decon all feature(decon all in 1 sec)
i raised my enchantng level from 1 to 7......
Did you create those glyphs on the same character that deconned them? That give very little inspiration. Best to craft on an alt or have someone else craft for you. But that would still be too little for 100 cp160 glyphs.
Maybe test it out some more and submit a bug report - check exactly how much inspiration you gain from 1 glyph and from 2 or more at a time. You can mouse over the crafting skill bar to see how much you have before and after deconning.
Its also an cap on how much your inspiration can raise by deconstructing high level items with low skill.
This is very visible with cp160 intricate items who don't give more inspiration than other white until you well above level 15.
Best to start with white or green glyph you get as loot, then move up to better ones this stop being effective