[galaxy-user] inconsistent cuffdiff

dear all these are the cuffdiff outputs for the same transcript/gene (one isoform only):

transcript differential expression value1 value2 log2fold test stat pvalue q value significant 18.8175 114.371 2.60357 -2.88358 0.00393177 0.0630024 no

gene differential expression value1 value2 log2fold test stat pvalue q value significant 18.8175 114.371 2.60357 -2.88358 0.00393177 0.0397768 yes

how could be that the gene expression in significnat but the transcript is not?all the values are the same, but the q values changes.Please explani!!I 'm really concerned about how cuffdiff makes these calculation!

thanks ib