I agree that it is doubtful you have an infection. When I do use a secondary I have seen what you seem to be describing. It is just ale yeast.
Got to use and trust your hydrometer. It is like a compass to a person in the woods. Proper sanatation should ease your mind.
Relax, have fun...
I use liquid yeast for some styles but have been strictly muntons prior to reading on here.
Used Notty with a kit and liked it.
Just read up on US-05 and that seems to bee good also.
Thanks for all the advice.
Takes a few hours to get from Frankfurt to Garmich.
I lived in Friedberg from 85-89. Lots of good beer to sample. In Frankfort search out an area called saxenhusen.
The local brewery in Friedberg is Licher. Google it. Pretty good beer.