Sorry I guess I rambled a bit..
I used 1 oz of FWH hops which were there throughout the 45 min fly sparge.
As I heated the wort to a boil, I removed the FWH hops from the small nylon hop bag and placed them in the DIY hop strainer that I made out of PVC and a paint strainer like you've seen here on HBT. The new stainer allowed the hops to leak out into the wort so I managed to scoop up much of them with a strainer bag. End result, Most of the FWH hops were removed before the boil.
I added .50 oz more to replace those strained out.
Maybe the removed hops had already been absorbed into the wort and the .5 oz is additional for a bigger IBU. Or mabye they had done little without boiling water and the .5 oz falls short of the recommended IBU's.
Not sure how this will effect the IBU's since I removed most of the FWH before the boil and replaced them .5 oz unused cascades.
Not really a big deal and I'm not worried.. I'm really just curious if the bitterness will be higher or lower than the original recipe.
Thanks for listening.