Yes, that is one way but then the preferred standard for parts is to have connector ID’s starting at 0 and this method it starts at 1.
I eventually resolved by opening up the fzp file and manually changing the connector numbers to make it consecutive. A little laborious but it worked.
But there is more to this problem. If I reduce the connector count then increase again then decrease and increase a 2nd time the new numbering is even more off.
For example start with an eight connector. the last connector id is 7. Add another 8 connectors for example and it skips connector id 8 and starts at 9. That’s as per above. Now reduce connector count down to zero or one. Now increase to say 20. This time it still starts at connector 9.