Please help identify problem!!! SOS PHAL

[Candice]

ARRRGGGHHH!! Okay I only own phals for right now...and all are not in bloom, but growing very nicely, i.e. new leaves and root growth lookin great.......
I have "saved" these plants from either Lowes or Walmart...at half price at Walmart and $1.00 each at Lowes!!! (Who could pass that up, right?!!!) BUT....on one plant, the leave has a spot or two that has gone all the way through, I don't know if it is rot or what...do I cut off the leave? Why is it a purplecolor towards the crown and on the underneath of leaves? Haven't seen that in the two years I've been collecting 'chids....have you? Also, another plant's leave looks like maybe a slug came by and eat through the leaf...is that what that is..or something else...
I grow outside here in South Alabama, I water cautiously, and fertilize correctly..that I know of....
PLEASE HELP ME AND MY 'CHIDS!!!!!
Oh and her's a pic of my first and only keiki which is on the plant I got from Walmart...yeeehhhh!!!
~Candice
I love this board and all its member...great info and ideas!!!!!