Based on boiling 8.50 gallonsliters at 1.050 for 60 minutes, this will decrease your wort by 1.80 gallonsliters, bringing your after boil OG to 1.061. You were planning on an OG of 1.061 so you are right on track. Nice job!
Overall a nice drinkable brown ale, but unfortunately the keg I transferred it to seems to have a defect and I'm getting a lot of extra gas in the line, causing an undesirable smoothness, almost like nitro, and with a ton of head.