Hello James,
what you had of total 3 trades is just normal especially if you trade with few EAs. Probably the ones that you saw last night are the ones you see in the account history today.
Regarding EA Studio, if your computer restarted it will now keep the work. With me sometimes, when there is an update, the computer restarts and I see the browsers reopened but no strategies in the collection. So this is normal.
Anyway, I prefer not to switch off the updating because I do not want to miss updates. The best for the trading, of course, is to keep the EAs and the generator/reactor running all the time.