Loner T, your help with Fusion Drive partitions is needed

I have the original question here

Re: Gaing free space after deleting partiton

Long story short: I tried to use BCA on brand new iMac. As not experienced user I divided my Fusion Drive into two same partitions.

When I realised my mistake, I deleted not used one (for BootCamp) and changed the size of Macintosh HD to full. The result is Macintosh HD with half capacity and me not able to gain another half of capacity back.

User Kappy, who was trying to help me suggested to ask you for help.

Here is a result of diskutil cs list

+-- Logical Volume Group 9637C49A-5E29-47B7-9792-A2CB1C141FE0

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

Name: Macintosh HD

Status: Online

Size: 1565854842880 B (1.6TB)

Free Space: 40960 B (41.0 KB)

|

+-< Physical Volume 79263FE2-025F-4E4C-9E8F-27178A685F59

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

| Index: 0

| Disk: disk0s2

| Status: Online

| Size: 120883990528 B (120.9 GB)

|

+-< Physical Volume 7211747B-2BBD-4895-9136-DF051A944DCA

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

| Index: 1

| Disk: disk1s2

| Status: Online

| Size: 1444970852352 B (1.4 TB)

|

+-> Logical Volume Family EDBCADD6-B865-4853-8CCC-BE6DA1642AE3

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

Encryption Type: None

|

+-> Logical Volume 8AB3213F-A673-4233-837C-564618697C22

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

Disk: disk2

Status: Online

Size (Total): 1560000069632 B (1.6 TB)

Revertible: No

LV Name: Macintosh HD

Volume Name: Macintosh HD

Content Hint: Apple_HFS

LVG Type: Fusion, Sparse

and here a result of diskutil list

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 121.3 GB
disk0

1: EFI EFI 314.6 MB
disk0s1

2: Apple_CoreStorage Macintosh HD 120.9 GB
disk0s2

3: Apple_Boot Boot OS X 134.2 MB
disk0s3

/dev/disk1 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *3.0 TB disk1

1: EFI EFI 209.7 MB
disk1s1

2: Apple_CoreStorage Macintosh HD 1.4 TB disk1s2

3: Apple_Boot Recovery HD 1.6 TB disk1s3

/dev/disk2 (internal, virtual):

#: TYPE NAME SIZE IDENTIFIER

0: Apple_HFS Macintosh HD +1.6 TB disk2

Logical Volume on disk0s2, disk1s2

84FE01B2-8C0C-4AE9-BB22-9088984F5ECC

Unencrypted Fusion Drive

/dev/disk3 (disk image):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme +123.9 MB
disk3

1: Apple_HFS DVBLink Player insta... 123.8 MB
disk3s

I tried to access the Terminal in Internet Recovery Mode, but it is not there. The Disk Utility in this mode is not helping - giving same results as in standard mode. I also reinstalled my macOS.