For a 2nd time I have upgraded a tactic and it hasn't actually upgraded. My barrage on my 2nd account was supposed to be level 4 today but is still showing as level 3. It took several days and cost 2.9m food. I have sent CS a message but not expecting anything useful back, as when have I ever!? It previously happened when upgrading sabotage, so like I say, it's not the first time this has happened.