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It is possible to switch a pin between analog and digital. The following AN may be a good reference for you. It introduces how to reuse the pin both for analog and digital in chapter 6.40.
Does this mean I can use digital interrupts on the same port as I have analogue reads happening without the analogue changes triggering the interrupt?
Do you use the same pin as an analogue input and digital interrupt? If you are doing so, you will need to switch the pin to digital first, then you can use digital interrupt.