.NET - Canadian DateTime Format Bug

I currently have an application that needs to support multiple cultures. A date string is being passed in and is being parsed to a DateTime object. To allow for multiple cultures I am first setting the thread's culture and UICulture.

Here is an example of my code as it is:

First I set the culture for this thread. This is passed in on the URL (ex. en-us, en-ca, fr-ca):

CultureInfo ci = new CultureInfo(culture, false);
Thread.CurrentThread.CurrentUICulture = ci;
Thread.CurrentThread.CurrentCulture = ci;

I then take a date string that is also passed in on the URL and convert it to a DateTime. Depending on the culture the date will be passed in as mm/dd/yyyy or dd/mm/yyyy.

I parse the date strings with the following code:

DateTime DateTimeObject;
bool validDate = DateTime.TryParse(DateStringFromURL, Thread.CurrentThread.CurrentCulture, DateTimeStyles.None, out DateTimeObject);

The TryParse works for most cultures and out comes a valid datetime object. A problem arises with en-ca and fr-ca though. If the wrong format is passed in, the datestring does not parse correctly.

The following shows which format .NET seems to expect for each culture:

         dd/MM/yyyy    MM/dd/yyyy
EN-CA      Valid        Invalid
FR-CA     Invalid        Valid

EDIT: To be more exact here are the examples causing me problems:

For EN-CA:

DateTime.Parse("26/08/2014") //VALID
DateTime.Parse("08/26/2014") //EXCEPTION THROWN

For FR-CA:

DateTime.Parse("26/08/2014") //EXCEPTION THROWN
DateTime.Parse("08/26/2014") //VALID

This is backwards from how other systems treat this culture's date formatting.

Why are the formats seemingly backwards? Is this a bug with .NET 4.5?

Any and all help would be appreciated, thanks.

NOTE: .NET Version 4.5