Firstly, my experience is that there is always a bit of a delay when putting them into reserves. 2-3 weeks seems quite normal. May be longer right now.
Secondly, my own issue related to wines bought after a tasting, which are on a special code to reflect the discount if bought within a week or so after the event. It was an inexperienced member of staff who took the order and I think that’s where it arose. The special code hadn’t been made available at that point so I had to phone the order as couldn’t do it online. I’m still not sure if the wines had been allocated to me or not in that case, but I did get them in the end, though it took a few emails/calls.
It could be that yours are still part of the backlog issue, as the wine will presumably still have to be moved from general stock to reserves. If it were me, I’d contact them rather than re-ordering.