Could you provide examples of Dreams whose meaning she came to believe after the fact? There are a number of symbols she interprets immediately, but I don't remember any where she later just fitted a convenient meaning onto them. The single example of subsequent interpretation I can find is from LOC, the understanding that Gawyn would be her Warder: "She had not realised the words were coming out of her mouth until they did, but once they did, she knew they were true. That dream."

In TOM, there is no such certainty, just free association: "Break the seals? She saw the image from her dream, Rand hacking at the ropes that bound the crystalline globe." Moreover, the Dream itself does not impute any sense of wrongness to the destruction of the globe; her opposition to breaking the seals is based purely on her own fear.
If he gives them an order, it certainly does. He's supposed to be crazy; they knew that when they signed on.
That the Seals need to be broken is far too well foreshadowed for her opposition to bear out. Rand's plan is certainly flawed; we know that touching both saidin and saidar to Shai'tan would result in catastrophe. And Egwene's opposition will be important. But her personal belief that the seals should not be shattered is based on no Dreamer's prophecy, and will need to be overcome.