Joomla website needs a mobile extension & some minor fixes

Our Joomla RocketTheme website based on the Panacea template needs a mobile extension so that it can be easily viewed on mobile devices. We also have a few minor repairs that our former designer left uncorrected: 1. We cannot find any way to edit a user profile after it is created. We also want to have the login slider visible on all pages, not just the homepage. 2. The blog archive function was working perfectly before, but now that we've added another entry it is splitting into two separate sections of dates. We need to have this feature permanently fixed or removed. 3. The ability to make comments on the website was supposed to be enabled for registered users only to avoid spam, but it was enabled for all users instead. I have corrected this mistake, but now we need to delete the spam comments that have already accumulated. I need to be shown how to do this. The website appeared to be perfect when the last project was completed, so our designer was paid in full. However, these mistakes were discovered about one month later and the designer refuses to correct them without further payment. To avoid this problem in the future, we would like to have a 60-day warranty on the work provided. This would NOT include maintenance to the site or correcting any problems with the website that are a result of another person; we only request that the warranty cover the work within this project. The website can be viewed at [login to view URL]