Normal log activity after adding new 5p batteries?

In Dec I added an additional four 5p batteries to my system. Due to the way the system is set up, we had to daisy chain the batteries on the same circuit as the first four (for a total of eight). So I understand that this means we're using PCS oversubscription which is fine. What I find interesting is that multiple times a day I get this registered in the system logs

"Charging and discharging of your Enphase Storage system are being curtailed to ensure it does not exceed 80% of the battery breaker capacity. This protects the battery breaker from damage due to over current."

Sometime up to six times a day (they eventually auto-close) and some are only open for a couple of minutes and sometimes open for hours until they close.

Is that normal and expected? Everything else about the system (running in full backup mode) seems to running smoothly.

Thanks for any insights.