hello I am new to umbraco. I installed  umbraco 7.0 and when the error occurred I upgrade to umbraco 7.0.2  and the error continued to happen

the error:

I have a document type with multiple properties:

name: pageName            Alias: pageName

name: pageDescription                 Alias: pageDescription

name: pageKeywords    Alias:pageKeywords

name: pagePublishDate                Alias pagePublishDate

when i update an Alias on one properties (eg if I changed Alias "pageName" to "Page Name") the system  changes the Alias on all properties to the modified Alias. so I end up with

name: pageName             Alias: pageName

name: pageDescription                 Alias: pageName

name: pageKeywords    Alias: pageName

name: pagePublishDate                Alias: pageName

 if I try to correct the error  by renaming  the modified Alias to the correct name, all the renaming  propertied get deleted except for one and the correct properties.  so I end up with

name: pageName   Alias: pageName - all deleted except this one

name: pageDescription  Alias: pageDescription - the corrected property

Am I doing something wrong ...

am I allowed to modify a property Name or Alias

am I allowed to put space between words in the Name or Alias

should I be using this version of umbraco or should I stick to version 6