I'm at 8 days in the fermenter. I took a SG, and I'm at 1.012.

It tasted really solid, although I'm surprised it wasn't actually more hoppy.
I bottom-dumped and rinsed the yeast.
I dry hopped 6oz of leaf (10 gallon batch) into one muslin hop bag (barely fit!).
So, the recipe calls for 12-14 days for the first dry hop, and 5 days for the second dry hop.
Question: When I do the second dry hop, should I remove the first dry hop, or leave it there (risking grassy notes?)?