Ok, no doubt 9lbs is a dramatic weight loss and normally i'd be pretty damn concerned. However, since your last diet was shit and you're now eating properly, it's fair to assume 1/2 of that weight loss was water, easily. The fact that strength is increasing is a great sign. How is overall energy throughout the day? Are you feeling fatigued at any point, with the exception of right before bed?

Aside from bench, how is strength on other lifts? Squats?

Based on what you're saying, I think you're fine but I suggest you get pics up ASAP - before and afters will most definitely help.