Mouse scrolls wrong way in Terminal window

[authorized.pants]

Greetings, everyone,

I am running Kali Linux 2016.1 rolling 32-bit (Debian 4.6.2-2kali2) as a VirtualBox VM (version 5.0.2 r102096). The host OS is Linux Mint 17.3 64-bit running on a Lenovo Thinkpad T430 laptop.

The VirtualBox guest tools are installed (version 5.0.24-dfsg-2 from the Kali repository) and they work, including the seamless desktop, mouse integration, shared clipboard, and drag and drop back and forth. I'm also sharing a local folder through the Shared Folders tool.

When I hold down the middle-mouse button and push the mouse cursor up, the terminal window instead goes down, like a dragging your finger up on a tablet. It seems to be tied to a feature called "Natural Scrolling" which I have disabled. It behaves the same way regardless of the setting. Screenshot of setting is attached.

The browser does not have this strange issue; only the terminal window.

I tried following the instructions here https://www.maketecheasier.com/rever...ion-in-ubuntu/ but the behavior was unchanged.
I found the same suggestion on other sites.

I'm not sure if these are relevant, but including them just the same.

root@unresponsive:~/incoming# lsusb
Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

root@unresponsive:~/incoming# lspci
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
00:01.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:02.0 VGA compatible controller: InnoTek Systemberatung GmbH VirtualBox Graphics Adapter
00:03.0 Ethernet controller: Intel Corporation 82540EM Gigabit Ethernet Controller (rev 02)
00:04.0 System peripheral: InnoTek Systemberatung GmbH VirtualBox Guest Service
00:05.0 Multimedia audio controller: Intel Corporation 82801AA AC'97 Audio Controller (rev 01)
00:06.0 USB controller: Apple Inc. KeyLargo/Intrepid USB
00:07.0 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 08)
00:0d.0 SATA controller: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) SATA Controller [AHCI mode] (rev 02)

Any guidance would be appreciated.

Thanks!
AP