It looks like you are finding blocks just fine, the only thing is your miner is finding them after their height already have been mined by somebody else.
This means your miner keeps working on the work it got dispatched for too long before checking whether it is still relevant.

Try to set the upper limit for new work to for example 20 seconds using the expiry argument:


Also, if your port is open and the client running, you will be acting as a full node.

You can also check this with:

After running the client for a while, you should see some inbound peers coming up ("inbound" : true).