Hi Chad,
This is normal behaviour for CR. We always assume the default is in the C:\inetpub\wwwroot folder. For "Custom" applications the norm is to simply copy the whole folder into your web sites default location from this folder:
C:\inetpub\wwwroot\aspnet_client\system_web\4_0_30319\crystalreportviewers13
I'll mention it to R&D to see if they can alter the install scripts to use the user default but likely this will be by design.
The installer supports VS 2010, 2012 and 2013. Microsoft keeps changing the rules for IISExpress, possibly this one got by....
Don