How do I keep each data file with it's correct Outlook account?

I have a computer that has Outlook 2010.   There are 5 accounts on this Outlook.  For some reason all of a sudden there is a new default data file which is Outlook.pst which is now causing all 5 accounts to show all e-mails of those 5 in all 5 accounts.  I cannot get rid of this new "Outlook.pst" and I cannot make any other Data File the "Set as Default"  These are all Imaps.   Should I reinstall Outlook and make them Pops and import the correct data file to the correct e-amil account?
syssolutAsked:
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JohnBusiness Consultant (Owner)Commented:
I would say that you apparently used the Manual Account Creation and pointed the accounts to the same PST. That looks like what happened.

Delete the Outlook Profile (Control Panel, Mail). No need to reinstall Outlook.

Now make new accounts, each with a new PST file. Once done, you can import files into the PST files you want,
Andrew LeniartIT Consultant & Freelance JournalistCommented:
syssolut,

John Hurst is right on the money, but if you need more detailed instructions, don't be shy to ask.
syssolutAuthor Commented:
John, when you say create new accounts, you mean under Outlook, not Mail in Control Panel correct?    It is asking for a new profile name, should I name it Outlook again?
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JohnBusiness Consultant (Owner)Commented:
You can create a new Outlook Profile in Control Panel , Mail and then in the same place you can set up email accounts. Microsoft is now using this convention
Andrew LeniartIT Consultant & Freelance JournalistCommented:
It is asking for a new profile name, should I name it Outlook again?
You can name the profile anything you like syssolut. Naming it Outlook again is fine, or you can give it any descriptive name you want.

Hope that's helpful.

Regards, Andrew
JohnBusiness Consultant (Owner)Commented:
With the newest version of Outlook with all patches, Microsoft assume an IMAP account. Best to use Control Panel, Mail to make new accounts now

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JohnBusiness Consultant (Owner)Commented:
Thank you and I was happy to help
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