your giant screenshots are not really helpful at all, because i'm not really sure i understand "what you expect vs. what is happening"
you are going to see that red spam as it cycles trying to find places to put stuff.
it is insane to me you have 8 slots bags.
you can get 10 slots from vendor in PoK for 1pp
you should just get unexpanded transcendent packs from bazaar and then expand them to 20 slots
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maybe it is possible your trashbags aren't large enough to place the items/bag inside, i don't know.
I'm not really sure i understand what you're trying to explain - but you are going to see that red spam as it goes to try and place the stuff in your bags
my recommendation: get some of the 20 slotters
here is me deleting the weapons in my bags and then killing my pet
i summon and new one and go through trying to dump them in my bags
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this toon's bags are a shitshow, ends up not having room until bags 7 and 8 to dump the weapons into
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I also don't know what UI you use, but i guess it might be possible if your UI has incorrect information for inventory layout, that mq might have issues doing stuff with it. I'd start with your bags