Duplicating contacts on the phone on every sync in MyPhoneEx

[Bruce A. Johnson]

Computer: Windows 8.1
Phone: Android 4.4.2

Ever since I installed the Truecaller app on my phone, MyPhoneExplorer always says that the phone has no contacts, and asks if it should it sync them. If I say yes, then all my contacts get duplicated on the phone. Another set gets sent to the phone every time I synch, so there will be many copies of every contact. If I say no to copying all the contacts over again, then I get prompted to remove them from my e-mail program (Thunderbird).

I've found that if I disable Truecaller or the native Contacts/People app, then this duplication does not happen. I like Truecaller, and the Contacts/People app has to be enabled to be able to add contacts on the phone itself.

Other than disabling, then re-enabling Truecaller every time I want to synch, is there another solution? Or a fix in MyPhoneExplorer?