Welcome to the "sometimes it's hard to get an email response from Luxire" club. I am in the same boat in the sense that I haven't heard back from them in a more than a week about an inquiry. I bet they are busy, since my previous experiences vis-a-vis communication were all very good with relatively short turnaround. In their defense I had an email conversation with Theresa on a Sunday morning a few weeks ago, and that tells me that they were probably quite busy at the time and using the weekend to catch up. She answered several of my emails that morning with answers to all my questions.
I'll throw this theory out there and see what people think: Re-Work of orders is likely to have a significant impact on their capacity and completion times. I worked in manufacturing for over a decade and I can tell you that re-work is a capacity/capital/resource killer. It would explain the variation in turnaround times at different timeframes.