Was it the FB group affiliated with this message board? There's a few feline diabetes group on FB.
My opinion is that this morning you gave a token dose because of the lower than usual preshot (very brave of you!) Prior to that you were giving 1.75 units and today's under 90 BG earned a reduction of 0.25 to 1.5units.
The larger depot from the 1.75 influenced a big part of today's cycle. You were also getting great low blues on the 1.75 dose. Today's token dose will have drained the depot a bit. I would take the SLGS sticky recommendation of reducing by 0.25.
No pressure, you hold the syringe and Tilda is your cat.

Bhooma should be sound asleep right now. Elise
@tiffmaxee or maybe Wendy
@Wendy&Neko might be around for dosing advice.