Tuner Availability

I have two HDHomeRun Connect Duos connected to my network. So I should be able to record 4 shows simultaneously. I occasionally get a message when more than two programs are scheduled to record, that I’ve exceeded the limit and the tuner is busy.
How do I set up the two Connect Duo’s with Channels DVR to allow more than two tuners at a time?

Thanks, Rich

Sent from my iPhone

Do both duos show in the settings screen of the DVR web ui with the proper channel lists attached?

Likely one of the HDHRs does not have guide data assigned on the dvr web UI