The sisters were last seen at 2.12 AM on Tuesday 7 January. The police incident number is 0735 on Tuesday 7 January so they were reported missing the same day - less than 24 hours.Where does it say the landlord reported them missing in less than 24 hours, please?
The police incident number and date is at the bottom of this report:

Sisters vanish in Scots city as CCTV captures them near river at 2am
Eliza and Henrietta Huszti, both 32, have gone missing from their home in Aberdeen city centre.
“We are continuing to speak to people who know Eliza and Henrietta and we urge anyone who has seen them or who has any information regarding their whereabouts to please contact 101 quoting incident number 0735 of Tuesday, 7 January, 2025.”