object spy - internal properties

[learner1]

while we spy an object then we can see two optons Run-time object properties and test objct properties
Test object properties are accessed using GETRO for runtime values
run -time object properties are accessed using object. properties

Here I added the "Checked" property in the objectIdentification for WEBEDIT and then spyed the objects
I am able to see "Checked" propoerty in both option of object spy(i.e run-time object properties and test objct properties )
But the values are differentr
In run-time object properties => Checked = False
In Test object properties => Checked = <NULL/Nothing>

why is it so happening. can anybody help me
actually i hope i have not understood the conccept of Internal properties of the object