Buddypress (WordPress) Custom Plug-in functions/edits

I need the plugins listed below to be made to work correctly with my website , i would like the methods used to be able to survive future (plugin/WordPress/BuddyPress) updates.i would also need a log of what changes were made just in case future (plugin/WordPress/BuddyPress) updates do erase the work done. if you would like to look at the site before apply for the job the domain is [login to view URL], here are the plugins and their problems. Plug-in Problems Buddypress Cover Photo- when a user or group tries to upload a background cover they get a message saying that the cover was uploaded successfully but nothing has been uploaded and the background cover has not changed at all. Buddypress Friend of a Friend(FOAF)- on the Potential friend page the output of potential is being displayed twice. Buddypress Group Tags- i need the output of groups to be displayed in “alphabetical” order for each tag page currently they display by the buddypress default “most active”. Mediapress- when a user or group try’s to upload a file into their activity stream they get “Server can not handle this much amount of data. Please upload a smaller file or ask your server administrator to change the settings.” However all settings are correct on the server and in WordPress.