hondacivic16ex

Hi guys,
I have these pics above. The color looks like yellow(ish)+ lemon green under transmission pan and rear side of it with a lot of black muddy semi hard - greasy stuff around. It is so confusing to see things with these colors under transmission pan, not red. Please help, dealer cant figure out where those stuff come from, the car is under warranty (I guess that's y they "cant" figure out), 33k mileage.
Note: I always reinstall metal shield (from manufacturer) back under the engine properly, those cant be mud or dirt while driving. Those colored stuff I mentioned above were on left side of the metal shield.
Thx a lot.