Continued difficulties with updates

This app actually uninstalls itself and wont update either. When go to iTunes to routinely update all applications, this application does not show up as having an update when it actually does and then discover that it has actually been removed from my iPhone. Only when manually search for this application and reinstall it again, does it update. Have had to do this repeatedly. Big problem with updates and actually staying on the iPhone without uninstalling itself.

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