This is because of your setup. One parameter in the event (that is optional) is "registration open date". This is the date that registration opens. If you want registration to be available immediately, leave this setting blank. It's only needed if you want to delay registration from becoming available. Same with a cut-off date (except for closing registration).
In a repeating event, an open date or cut-off date is dynamically generated for each repeat based on the distance between the given open and closed dates compared to the event dates. Example...
Event is on the 10th and the open date is the 1st. That is 9 days before the event. Now, each repeat will have an open date that is 9 days before that repeat event starts.
So... either set the open date for an appropriate timeframe, or just leave it blank when you create the repeating event. Thanks.