Another non-medical opinion on the phenomenon....
I agree with the few others that pointed out that, although the direct effect of alchohol on your heart rate might be to lower it somewhat, its other effects (whether it be its diuretic properties, or the enlarging of your bloodvessels?) may ultimately cause an increase in your HR above what your average is.
I wouldn't put too much stock in our "educated" guesses though. Especially since there's other factors to consider. Such as the accuracy of those monitors vs. the one you normally use. I've heard/read differing accounts of how accurate those hand conact monitors can be; regardless, there's no knowing if the one you used was particularly accurate. Also, perhaps it could have been something you ate. If you ate foods higher in sodium than you would normally would have before exercise, that could have been a contributing factor.
So, I guess to answer your question as definitively as possible: "possibly".