Which field in the Repeater isn’t behaving as you want?
It could very well be that the errors I pointed out above are the cause of the problem.
I wanted to try some tests to see for myself what’s happening, but I’m certainly not going to start entering payments for members of your site.
I would suggest that you first correct the errors and see if that helps.
If you still encounter the issue after fixing the errors, perhaps create a test member that I can apply some payments.