Every day I have new questions to merit. So, I have activity 238, to the next rank I miss 2. My Merit number is 101 and for the next rank requrement is 250. Will I stay in my full member rank as far as I will not add 149 merits more? Yes? No? Maybe? 
You are correct. Unfortunately, you were one of the unfortunate that had just under the required activity to bump up to next rank prior to merit. You do indeed need another149 merits.