@jamielovelace Public Keys start with G and secret keys start with S.
With respect to your question. It looks like in between making that initial deposit of 6500XLM and making those other two deposits, the account was merged (i.e. deleted).
Probably this is related to the network migration. I think there is some service to reclaim lumens that were on the other network for ones on the current one.
You can see your account history at lupoex.com (login with your public key and the navigate to account history)
