Short visit vs several hours

Sorry, I dont know where to post this. Really need help though.

My landlord has sent a document that listed house rule. The rule that i need help understanding is “Guest may come for short occasional visits with the consent of the other tenants “

To me short visit is 1-2hours Landlord said its several hours,but not specifying even after asking.

My housemate guests are leaving after 5-8hours. Once housemate said guests will leave in the morning,they left at 11:59am. A different time i was informed guest would leave in afternoon,they left at 4pm. Recently they said guest would leave early,they left after lunch.

I’m really confused with this “guest visiting rules”. I feel these giests are overstaying my welcome. Or am I nightmare housemate? I feel really uncomfortable having strangers around for more than 4 hours.