Hello @Catgoddess_99
What a pain, I am sorry to hear that even with changing the dates this has not been resolved.
I know this has been an ongoing issue for you. As the dates of your sits have been updated and are no longer overlapping, it seems that there must be a small glitch in the system thinking they still overlap for some reason.
I would get back to the Membership Service team and ask them to raise this for you.
You can reach them at support@trustedhousesitters.com or the help desk chat at:
https://support.trustedhousesitters.com/hc/en-gb
I will also copy the thread where this was previously discussed for some context for other reading.
I hope they find out what is happening and get it resolved 