Thanks for your help. I spoke to a super helpful member of a support team. I made my way through the slightly daft automated call system options and spoke to someone for account support on mobiles/ sims (cant quite remember the exact option). I'll share the resolution in the unlikely event the same things happens to someone else.
As the 2nd order was placed within 10-15 minutes of the 1st, it was cancelled at the EE end on the assumption it was a duplicate, I assume this was automated. The replacement sim that was issued after my first support call to sales, was actually for the line that had been setup without issues, so that was a bit weird. Anyway, all was checked & clarified and I was put through to sales, who sorted the additional sim order there and then, without any hassle. Both lines are now showing on my account. It did look at one point like a temporary number, from when I ported my wife's line a few weeks ago, had switched back on. It reappeared on my account whilst I was looking into this issue. Short panic that I was going to lose her number & it was going badly wrong, but all seems fine now.
I've had Orange / EE on & off for at least 25 years & have generally had a really good experience. I would say that these days, the comms around orders, order dispatch & tracking from EE don't compare well to others, where I've seen some super slick comms etc. Perhaps it's due to integrating with BT's supply chain & logistics. In my case, an email or message updating that the order had been cancelled would have saved loads of time all round.
Anyway, all sorted & 2 sims now up & running on a good deal. Support was great once I'd got to the right place.
