Hi lnguyen41,
Your lovely
Spider Plant (Chlorophytum comosum) looks fine and I agree with the advise of not repotting. Your plant likely suffered a bit of stress in going from the greenhouse, to Home Depot Garden Center, to your home and it's now acclimating to it's new location; repotting at this time would just cause additional issues and stress.
I don't think there are many pristine, perfect plants; they can get specks, spots and marks on the leaves and the flowers which can be caused by numerous things like changes in water, lighting changes, bug bites, etc. Unless the issue becomes drastic and more noticeable throughout the plant, I wouldn't worry. If the plant is so root bound that water is rushing through the pot really quickly, just water longer and more often. Give the plant bright light but no direct, hot sun.
