switching profiles registration : needs clear cache

Hi Stackideas team,

I have 2 links in my meny leading each to a specific profile type registration:
- link one: href= http://mysite/login-en/registration?task=selectType&profile_id=4&controller=registration
- link two: href= http://mysite/login-en/registration?task=selectType&profile_id=2&controller=registration

both links are leading to a page shown in the browser as: http://mysite/login-en/registration/steps/1

the problem:
if I click on link one, I arrive on http://mysite/login-en/registration/steps/1 corresponding to profile type one registration form ;
then if I click on link two, I arrive on http://mysite/login-en/registration/steps/1 with still profile type one registration form and not the profile type two registration form.

I guess this is because the browser associates http://mysite/login-en/registration/steps/1 with profile type one.

If I clear the cache of the browser and then click on link two links I correctly arrive to http://mysite/login-en/registration/steps/1 with profile type two registration form.

So one my configuration, switching between profile types requires browser caching to work.

Even with site cache settings on off.

Do you have a solution to avoid clearing browser cache?

Many thanks in advance

Raph