I did a quest in Sandoria and received 119 gil first, but saw that my gil had not increased and stayed at 80g. When I finished the quest, the game said I Obtained the Tsahyan Mask, but again, nowhere to be found. Is this unusual?
The quest was "Rosel the Armorer."

Don't know if this quest is bugged or not, but if you see me in game (Hollywoody) I can give you some gil for your trouble.

Quests don't actually give those items. That's from the text id's being wrong thanks to SE's version updates. They'll go away and be replaced with the correct text soon as nas updates the version.

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