Questions about Adjusting a Recipe with Oats

[off7spring]

Hi. I found a recipe online of a clone beer that I wanted to try making.

The original recipe calls for:

Grain:
81.9% - 8lbs 8oz - CMC Superior Pale Ale Malt (3.1 SRM)
18.1% - 1lbs 14oz - Flaked Oats

Below is my adjusted recipe.

My question is: Am I correct in scaling up the recipe to maintain the same ratio as the original recipe, or should I have kept the same amount of oats as in the original recipe? I'm going for a softer mouth feel which is why I'm using oats, I just don't want to make it too thick.

Here's my adjusted recipe:

Brew Method: All Grain
Style Name: American IPA
Boil Time: 60 min
Batch Size: 5.5 gallons (fermentor volume)
Boil Size: 7 gallons
Boil Gravity: 1.049
Efficiency: 70% (brew house)

STATS:
Original Gravity: 1.062
Final Gravity: 1.015
ABV (standard): 6.12%
IBU (tinseth): 46.66
SRM (morey): 4.23

FERMENTABLES:
11 lb - American - Organic Pale 2-Row (81.9%)
2.43 lb - Flaked Oats (18.1%)

HOPS:
0.5 oz - Columbus, Type: Pellet, AA: 15, Use: First Wort, IBU: 15.88
1 oz - Amarillo, Type: Pellet, AA: 8.6, Use: Boil for 5 min, IBU: 5.99
1 oz - Centennial, Type: Pellet, AA: 10, Use: Boil for 5 min, IBU: 6.97
0.75 oz - Citra, Type: Pellet, AA: 11, Use: Boil for 5 min, IBU: 5.75
1 oz - Simcoe, Type: Pellet, AA: 12.7, Use: Boil for 5 min, IBU: 8.85
1 oz - Amarillo, Type: Pellet, AA: 8.6, Use: Boil for 0.5 min, IBU: 0.65
1 oz - Centennial, Type: Pellet, AA: 10, Use: Boil for 0.5 min, IBU: 0.76
1 oz - Citra, Type: Pellet, AA: 11, Use: Boil for 0.5 min, IBU: 0.84
1 oz - Simcoe, Type: Pellet, AA: 12.7, Use: Boil for 0.5 min, IBU: 0.97
2 oz - Amarillo, Type: Pellet, AA: 8.6, Use: Dry Hop for 5 days
2 oz - Centennial, Type: Pellet, AA: 10, Use: Dry Hop for 5 days
1.25 oz - Citra, Type: Pellet, AA: 11, Use: Dry Hop for 5 days
1 oz - Galaxy, Type: Pellet, AA: 14.25, Use: Dry Hop for 5 days
2 oz - Simcoe, Type: Pellet, AA: 12.7, Use: Dry Hop for 5 days

MASH GUIDELINES:
1) Infusion, Temp: 150 F, Time: 60 min, Amount: 4.2 gal, Mash
2) Sparge, Temp: 170 F, Time: 15 min, Amount: 5.5 gal, Batch Sparge

OTHER INGREDIENTS:
1 each - Whirlfloc, Time: 15 min, Type: Fining, Use: Boil
1 tsp - Yeast Nutrient, Time: 15 min, Type: Other, Use: Boil

YEAST:
Wyeast - London Ale III 1318
Starter: Yes
Form: Liquid
Attenuation (avg): 73%
Flocculation: High
Optimum Temp: 64 - 74 F
Fermentation Temp: 66 F
Pitch Rate: 0.75 (M cells / ml / deg P)