Definitely a god catch. I’d have interpreted as physical CPU as in sockets, but Univention could clarify this since the term physical CPU can be a bit vague these days.
I am pretty sure that CPU sockets are meant with “Maximum number of physical CPUs”, because a limitation to a maximum of 2 cores would not be realistic nowadays.
thank you for the question. Yes, we mean the physical CPU sockets. The Base Subscription is the only level where this is limited to a maximum (of 2). With the Standard and Premium Subscription it is unlimited.