Validations are firing unnecessarily

I am getting a weird issue any help would be welcome

I am using telerik RadMaskedTextBox for phone nos . Initially when I access my Page PrimaryInfo.aspx the page is loading once and when I save it, it saves right but when I try to navigate back to the same page from another page  it is loading twice . and when I am trying to save validations are firing even though the data in those rad controls is right and Validations are firing only for telerik rad controls specifically RedMaskedTextbox. and the weird thing is  they are getting fired only in chrome.
here is my small bit of code that i used for telerik rad controls
<telerik:RadMaskedTextBox ID="rtbDaytimePhone" runat="server" Mask="###-###-####(####)" TabIndex="28" Width="145px"> </telerik:RadMaskedTextBox> &nbsp;<asp:RequiredFieldValidator ID="rfvDaytimePhone" runat="server" Contro ...