Unable to create Bootcamp partition in High Sierra

Late 2015 5k iMac with 2TB Fusion Drive.

I am having the same issue others on this forum are having regarding creating a Bootcamp partition in High Sierra. I have read the post and followed suggestions (Including clean installation) with no success. In the process I think I have created an issue with my partitions as Disk Utility now only shows 1.8TB available. Here is my diskutil list and cs list. Any help would be appreciated!

Last login: Fri Nov 17 11:05:56 on ttys000

iMac:~ nestegard$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *121.3 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_CoreStorage Macintosh HD 121.0 GB disk0s2

3: Apple_Boot Boot OS X 134.2 MB disk0s3

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk1

1: EFI EFI 209.7 MB disk1s1

2: Apple_CoreStorage Macintosh HD 1.7 TB disk1s2

3: Apple_Boot Recovery HD 315.3 GB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +1.8 TB disk2

Logical Volume on disk0s2, disk1s2

1379A39E-EFBF-44B5-B5D4-F8DD995D1D88

Unencrypted Fusion Drive

/dev/disk3 (external, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *2.0 TB disk3

1: EFI EFI 209.7 MB disk3s1

2: Apple_HFS Time Machine 2.0 TB disk3s2

iMac:~ nestegard$ diskutil cs list

CoreStorage logical volume groups (1 found)

|

+-- Logical Volume Group D3819888-E41C-4A37-8B35-1411E3DF9FC2

=========================================================

Name: Macintosh HD

Status: Online

Size: 1805855301632 B (1.8 TB)

Free Space: 65536 B (65.5 KB)

|

+-< Physical Volume 615B7F13-6E4F-4D8E-BA5E-4CD0F6C54E49

| ----------------------------------------------------

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 120988852224 B (121.0 GB)

|

+-< Physical Volume B8EC0ACA-3ABF-4DBA-A08E-7873C9267E8D

| ----------------------------------------------------

| Index: 1

| Disk: disk1s2

| Status: Online

| Size: 1684866449408 B (1.7 TB)

|

+-> Logical Volume Family 4C0821D7-8BF5-49F8-B113-6047102EA03E

----------------------------------------------------------

Encryption Type: None

|

+-> Logical Volume 1379A39E-EFBF-44B5-B5D4-F8DD995D1D88

---------------------------------------------------

Disk: disk2

Status: Online

Size (Total): 1799999979520 B (1.8 TB)

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

LVG Type: Fusion, Sparse

iMac:~ nestegard$