Hi Tiffany, in that first picture it actually looks to me like a root which was cut off. That is sometimes done with areal roots to make the plant look neater for sale (I wish they wouldn't but they do).
I'm afraid I can't really tell on the second photo, but if it was mine I wouldn't worry too much at this point.
Yes spikes can be different colours, though the new tip is usually green. Red/brown spikes tend to go with red/dark flowers and lighter spikes with lighter flowers, though I've seen times when they don't match up like that.
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