I found after April everything went weird, sales seem to be going back to normal after the last 2 months so I suspect the problem may be fixed. Sales is also one of those things that are hard to track when you dont have all the anayltics in your hands, the website knows more about where the foot traffic is, what months are best for what type of products. I used to like to read the CGT Blog since they gave lots of that data for free with visual charts, less so these days so best to track your own. For example I check quarterly, half and full year sales against previous years and if everything is moving up then its a sign that a bad month is just a bad month and nothing to worry about.