Websocket quote timestamp repeating with different ask price?

Am I missing something? This first column is the timestamp that comes from Alpaca. The second timestamp is my own, signifying a separate websocket packet. Why are the prices different for the same Alpaca timestamp? I’m not doing any rounding of the Alpaca timestamp, but it seems like they must be? Why else would the ask price be changing for the same timestamp? Curious if anyone else has seen this. Thanks!