CFWINDOW problem

["CF_Oracle"]

Cant't figure out why cfinput  type="datefield" in 2 cfwindows created from 
main page bahaves differently depending on ORDER in which they created. 
Calendar icon became inactive in the second window if the first one was called 
and then closed. (The input field is still active for manual data entry). But 
if main page refreshed it's active again. In the first window the calendar 
active at any time without refreshing main page and when called in any order. 
These 2 windows are identical. Bahavior is the same with any settings of 
cfwindow attriburtes like refreshOnShow (true or false) and others. And if to 
switch the order of windows creation in main page, the calendar in the other 
pop-up window became frozen and first one previously inactive works fine. Is it 
a bug in CF8?
 This is code in main page:
 <cfajaximport  tags="cfwindow, cfform,  cfinput-datefield" >
 <cfwindow title="WindowName1"                          
                        name="MyName1"
                        height="380" 
                        modal="false"                   
                        refreshOnShow="true"     
                        initShow="false"
                        source="../MySource1.cfm"/ >

 <cfwindow title="WindowName2"                          
                        name="MyName2"
                        height="380" 
                        modal="false"                   
                        refreshOnShow="true"     
                        initShow="false"
                        source="../MySource2.cfm"/ >

 Calles for pop-up windows:
 <a  href="#" onclick="javascript:ColdFusion.Window.show(MyName1);">Title 1</a>
 <a  href="#" onclick="javascript:ColdFusion.Window.show(MyName2);">Title 2</a>

 in called windows:
 <cfform>
    <cfinput  type="datefield" name="FieldName1">
 .......
 </cfform>

 <cfform>
    <cfinput  type="datefield" name="FieldName2">
 .......
 </cfform>