NBMiner and new Ethminer pool for ERG

This is first time I’ve used a custom pool but I’m not completely understanding what this stat means?

Accepted Rejected Invalid, Accepted Ratio
value was 90% now 89% which seems to me to indicate that I have a extremely high failure rate in getting work. Is that correct assumption? I found one youtube on troubleshooting starting with latency issue to pool but this pool auto switch you to the closest pool it says, so not sure what troubleshooting steps to take here, if there is a Post on this can someone please share?

I guess I’’ abandon Ethermine for ERG and use Nanopool