Black Spots on Angreacum Crestwood

[doctorw]

Around the time I got it, my Angraecum Crestwood had developed small black spots on some of it's leaves, I removed the worst ones and circled the some of the ones on the healthier leaves. It's been about 4 months now and the spot haven't spread and for the most part remained the same size with the only change really being the slightly sinking in? I know the were just shipped when I got them and may have suffered some fertilizer burn, are these spots just normal Ang. aging of stress marks from their original shipping or is there a chance it is infection and it's just stalled due to colder weather?