Yellowing Leaves on Brassavola (Rhyncholaelia) digbyana

[OK2BU]

Newbie here!
I am first going to confess, I am an Orchid Killer! Having some decent experience with perennial and vegetable gardens while living in Virginia, I purchased two orchids 8 years ago, thinking how difficult can it be??
Well, long story short, it was really HARD!

So having given you my sordid background, I'm now living in Southwest Florida. One can't go shopping without bumping into a plethora of these beautiful plants, so I decided to give it another try and purchased a Golf Green "Hair Pig" orchid a few months ago. It actually has had 3 blooms! That's good right??

Now queue the scary music, the last flower just finished blooming and the leaf that it bloomed from is now yellowing. OH NO!! There also seems to be some yellowing on other leaves.

I have researched and learned the following:
A lighter yellow 'complexion' to the leaves is preferable.
Too green and they aren't getting enough light.
One should allow the roots to dry before watering.
Do not over fertilize,
but I do occasionally 'mist' her with a diluted orchid fertilizer.

Wanting my killer days to be over, can anyone take a look at these pics and weigh in?