Udev rules don’t distinguish

I have a Neato XV-* lidar unit, connected with a Sparkfun FTDI chip, and an Arduino Uno. They show up as /dev/ttyUSB0 and /dev/ttyUSB1, unpredictably unassigned.

So, I wrote /etc/udev/rules.d/80-arduinouno.rules:

SUBSYSTEM=="tty",
ATTRS{idProduct}=="7523", ATTRS{idVendor}=="1a86",
MODE="0666",
OWNER="pi", GROUP="pi",
SYMLINK+="arduinouno"

… and /etc/udev/rules.d/90-neatolidar.rules:

SUBSYSTEM=="tty", ENV(ID_SERIAL_SHORT)=="AL01OTZS",
ATTRS{idProduct}=="6001", ATTRS{idVendor}=="0403", ATTRS{serial}=="AL01OTZS",
MODE="0666", OWNER="pi", GROUP="pi",
SYMLINK+="neatolidar"

idProduct and idVendor were taken from the first line of

udevadm info --attribute-walk --name=/dev/ttyUSB1 | grep idProduct

and

udevadm info --attribute-walk --name=/dev/ttyUSB1 | grep idVendor

respectively, cross-referenced with the output of lsusb. IS_SERIAL_SHORT was taken from the output of

udevadm info -q all -n /dev/ttyUSB0 | grep ID_SERIAL

or

udevadm info --attribute-walk --name=/dev/ttyUSB0 | grep {serial}

but, while this command worked for the FTDI/lidar, it only gave an ID_SERIAL, not an ID_SERIAL_SHORT, for the Arduino.

When I do a sudo service udev restart, then try plugging and unplugging the devices while monitoring watch 'ls -lah /dev | grep ">"', I see symlinks appearing for both arduinouno and neatolidar to whichever ttyUSB* was plugged in last. That is, at the moment, I see both arduinouno -> ttyUSB1 and neatolidar -> ttyUSB1. But if I unplug and replug ttyUSB0, both will switch to that.

How can I get my udev rules to distinguish these two devices, and only fire when the correct device is detected?

If it matters, this is on a Raspberry Pi 3 running Raspbian Jessie. The Arduino is connected directly to the RPi, while the FTDI is connected to a cheap yellow EagleTec 4-port USB hub.