Weeks in Payment Plans should be Total Payments

### Reproduction Steps

+ Set up an access plan with a payment ever 2 weeks for 12 weeks
+ the 12 weeks should be 12 total payments
+ on the orders page this should also reflect 12 total payments for access plan details

### Expected Behavior

+

### Actual Behavior

+ 

### Error Messages / Logs

+ Include any relevant error messages or log files
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### System and Environment Information

System Report

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This issue has be recreated:
+ [x] Locally
+ [x] On a staging site
+ [x] On a production website
+ [x] With only LifterLMS and a default theme

### Browser, Device, and Operating System Information

+ Browser name and version
+ Operating System name and version
+ Device name and version (if applicable)