Vanda ex-spurt needed

[voyager]

This is a feral Vanda growing on a dead Ohia tree in my yard.
I first saw it bloom in Feb. of 2015 and took some photos about 4 days apart.



Then, I photographed it again in Feb. of 2016.


I skipped photographing it in 2017, when I believe it bloomed in the autumn, like Aug. or Sept.
It did not bloom in 2018 during the volcanic eruption.

Then, I have photographed it again when it has bloomed in Jun. of 2019.


I believe when the 2016 pics were posted someone noted that it looked a lot like it might be a Vanda luzonica.
I agree except for the yellow coloring to the edges of their lip.
That almost assuredly indicates to me that it is probably a V. luzonica crossed with something else, at best a primary hybrid.

Question #1:
Does anyone recognize this Vanda?

Question #2:
As you can see in the 2015 and 2016 photos, the blossoms are more heavily spotted while in the 2019 photo the tepals have more solidly colored tips.

The only explanations I can come up with are possibly an effect of the eruption gasses, or the plant becoming more mature.
Any other thoughts on what might cause this to happen?

EDIT:
In 2016 I crawled up a ladder, somewhat precariously, and smelled it .
It was fragrant, I think.
If I can manage it I'll go up again tomorrow and confirm that.