Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,182
If you are seeing 2018 nights count in your 2019 numbers, you should expect that to be fixed in a year-end audit.
If you have genuinely done the required nights in 2019, you'll be fine, even if it requires some chasing in early 2020.