problem with profile type default and cache

Good Mornig,

I have strange issue between Payplans and easysocial.

I have 4 profile type in easysocial ad 6 plans of service, some free and some paied.

During the debug of the site just 24 hour before the release I notece that when I select a plan for the first time select the profile correct, but if I want to change plan give me again the same profile type.

the strange is that eve from other browser and location I get the same error, and if I erase the cache from the site select againgthe corect one. so has to be beh cache.

but another issue is the fact that random e profile type alone become default giving sense that give the wrong account, but after that that I verify the situtation of default profile type is not working well.

I am a bit lost. Any Help?

Best Regards Antonio