My husband and I share a computer and iTunes. We have separate Apple IDs. When my husband syncs his phone, he gets a whole new page of all the apps from my phone. I can see as it's syncing, that it's "copying" apps that are only on my phone. How do I stop this from happening? He has to go through and delete all these extra apps each time.
By default apps are copied to iTunes from the phone when syncing. By default apps are copied from iTunes to the phone when syncing. This can be annoying - personally it's my kids who put a thousand irritating games on their phone, but I can see that a husband would be just as bad.
Connect your phones to iTunes. Find them in the left-side menu, or drop-down.
Under the Apps menu you can turn off syncing.