TBC Fire Mage T5 Set Bonus 2parts bug?

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Hello, it seems that BIS simulator suggests me to equip T5 Gloves of Trisfal but it makes no sense here.
Same bug appears about T5 Robes of Trisfal suggestion.

It looks like AMR is suggesting me to equip the first T5 bonus set although i’m supposed to dps in fireball/scorch classic cycle

It’s picking them for the stats, not because of the set bonus. You can play around with the settings if you don’t want those items to be picked - reducing the fight length or adding more mana consumables will make it not pick both t5 pieces. The higher item level gets you more intellect, which is needed for the 180 second fight. I think the leggings are just superior no matter what, though.