Help with recip. Conversion

Here's what we did (12 gallon batch):
18 lbs - 2-row malt
6.5 lbs rye malt
1 lb Flaked Wheat
3 lbs Munich malt
1.25 lbs Cara-Pils malt
1.25 lbs Wheat malt
3.5 oz Black Patent
3 lbs amber candi/invert sugar

2.25 oz Columbus(12.2%) - 60 minutes
3 oz Columbus(12.2%) - 40 minutes
2 oz. Centennial(7%) - 30 minutes
1 oz. Centennial(7%) - 10 minutes
We'll be dry-hopping in the secondary with:
1.5 oz Amarillo
2 oz. Centennial


OG - 1.086
IBUs - 81.3
SRM - 16
8% ABV Estimated
WL California V


Can Someone help me convert this to a late addition extract with steeped specialty grain recipie. I was using Beer Alchemy and I could not seem to get it. 18lbs of 2 row came out to be 10.8 lbs of DME which right off the bat put me over the SG for the recip. With all the fermetables added it gave me an estimated ABV of 20%. On the hops front it gave me an IBU of 160 or something crazy. I am obviously doing something wrong. I want to make this beer so damn bad. Many thanks in advance. Anyone know what I am doing wrong?

ej

 

Did you not adjust for 10 gallons when you calculated this?

@Beersmith partial mash (70% mash efficiency):

Amount Item Type % or IBU
9.43 lb Light Dry Extract (8.0 SRM) Dry Extract 34.39 %
5.61 lb Rye Malt (4.7 SRM) Grain 20.46 %
3.89 lb Pale Malt (2 Row) US (2.0 SRM) Grain 14.18 %
2.59 lb Munich Malt (9.0 SRM) Grain 9.45 %
1.08 lb Cara-Pils/Dextrine (2.0 SRM) Grain 3.94 %
1.08 lb Wheat Malt, Ger (2.0 SRM) Grain 3.94 %
0.86 lb Wheat, Flaked (1.6 SRM) Grain 3.15 %
0.21 lb Black (Patent) Malt (500.0 SRM) Grain 0.78 %
2.25 oz Columbus (Tomahawk) [12.20 %] (60 min) Hops 37.4 IBU
3.00 oz Columbus (Tomahawk) [12.20 %] (40 min) Hops 43.8 IBU
2.00 oz Centennial [7.00 %] (30 min) Hops 14.7 IBU
1.00 oz Centennial [7.00 %] (10 min) Hops 3.5 IBU
2.67 lb Candi Sugar, Amber (75.0 SRM) Sugar 9.72 %

Est Original Gravity: 1.087 SG
Est Final Gravity: 1.022 SG
Estimated Alcohol by Vol: 8.48 %
Bitterness: 99.3 IBU
Est Color: 20.2 SRM

That's some wild looking stuff!