The doubled up nights for qualifying (paid-for) nights will get you to Platinum 50 / 75 for 2019 but if you don’t do 50 actual paid-for nights then the year will not count for lifetime status.
I had the same last year. Ended up scraping P75 anyway so was over 50 paid-for nights and hence the year qualifies as a lifetime night. The doubled up nights got me to P75.