ATF magnetic drain plug more "stuff" than normal. Opinions Please.

I would really appreciate your opinions on this. I have a 2003 Honda Odyssey which many know have a weak auto trans notorious for high failure rate.

I have been running Amsoil Uni Synthetic ATF for some time coupled with a Magnefine In-line tranny filter. This combo I believe has allowed me to get so far 178,000 miles on the original tranny which is not the norm for these transmissions. The other day I did a ATF drain/fill and noticed more "stuff" on the drain bolt magnetic plug than normal...in fact normally I do not see anything on it. This time I did see more than normal which is alarming to me.

1) Question: How did this get by the Magnefine?
2) Question: Is this a sign that the Magnefine needs to be changed? It has only been in the vehicle for 10,000 miles.
3) Question: If I have a Magnefine installed is it even worth changing the OEM ATF filter? I have not changed it yet because of the oil jet recall making it more complicated to do so.

I know I am on borrowed time so perhaps this is the beginning of the end of my original tranny.

Thank you for your help.