GNE did a similar thing in 2016 when they got the brand new Indigo Optare Solo's at Percy Main 672 - 680, and then a couple of months later they added the 42 to the indigo network so there wasn't enough of them, so some trips were then the older 61 plates instead.

Also when the X84/85 went X lines was the PVR not 5 for a while, with 6337, or was that just a spare, I am not sure. There are other examples which have happened later after an order, like with 3962 and 65 being added in to the Angel as well as 6056 - 70, and the PVR of the 10 services has changed many times, as has the 307/309 since their buses were ordered.