Possible cache error ?? (changes made to code on the server does not reflect immediately)

[eluser]ebuoe[/eluser]
i have been using codeigniter for quite some time now but i havent experienced anything like this , after i upload to the server , i visit the page , make minor changes but this does not reflect immediately , and the changes are required to test what i'm doing .

So my question :
Is this a cache issue ??

because i'm not even using codeigniter's cache library and i even cleared the cache and n browsing history on my browsers and also tried visiting from other devices.

If the problem s cache is there a way i could disable this during development phase?