from my reading i think i remember this... feminised seeds are made when male flowers are forced to be produced on a truly female plant ( i think some sort of chemical or hormone is applied for this to happen) the pollen from that flower is used to pollenate the other female flowers present on the plant. this means the seeds created technically have only dna of that female plant... thusly producing more females once germinated.... but yes, more hermies too... can anyone back this up?
Yes, that's pretty much correct.
The reason feminised seeds produce more hermies than standard seeds is because a feminised seed can only be female or hermaphrodite genetically, it cannot be male, whereas standard seeds can only be genetically male or female, not hermaphrodite which can only be caused by partial sex reversal by phenotype or environmental factors, which also applies to feminsed seeds.
So feminised seeds are much more likely to produce hermaphrodites because they can do so genetically and phenotypically whereas standard seeds can only do so phenotypically or influenced by environmental factors.