Some sellers do "maintenance feeding" (ie. feeding the minimal amount for a snake to remain alive, so they don't grow, or out-grow their minimal caging & deli-cup to sell).
It's also possible that she was a fussy feeder...time will tell, I guess. (-so you didn't get a feeding record or hatch date from this seller?)
Please do post the pics you took...we don't all describe colors the same way, & while yellow is normal, orange is not. Any doubt, save it for a vet.
(I know the colors were discussed here but I don't recall what thread & what orange means in snake poo...but you don't want to see red either-
for obvious reasons- possible bleeding- and since yellow + red = orange, maybe that was the concern with orange poo?)