Yes this is pretty common, the same happened to me. Don’t worry about confusing them with multiple readings, just resubmit throguh the PP app. You will be asked for readings on a regular (monthly) basis to allow them to keep track of your energy use and also issue you with an accurate bill. Don’t forget that PP will also take an upfront DD payment just after your switch.
Any other questions, the community is well placed to answer or else find Wattbott on your App and ‘message the team’ and the PP service guys will respond in 48hrs. Remember there is no contact centre and everything is either done through the community or App.
I hope this helps.
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Sorry I also meant to say that the meter readings help them to keep track of your monthly DD payments to ensure you aren’t paying too much/too little.
Your DD payments will have been set to a higher amount in the winter months. It's split 60/40, you pay 60% of your annual estimated charge in the winter months (October - February) and 40% in the summer months (March - September). You can check this in the app if you click on My Account then scroll down to Your Payment Plan.
If you need to change the DD, click on help in the PP app, then ask Wattbott, then ‘message the team’, asking for your DD to be increased/decreased. Someone should then get back you within 48 hours