[Xrystal]

Your code.

local function recordingSessionInfo()
    sessionCount = sessionCount + 1;  
    sessionInfo = sessionInfo or {}
    sessionValue = tonumber(sessionCount);
    sessionInfo = { 
    }
    tinsert( sessionInfo, currentDate, sessionCount )
end

tinsert only needs 2 parameters, the destination table and the source data.
tinsert(table,data)
data however can be anything, a number, a string. Even a table.

So, try changing the tinsert line to something like the following and see how different it looks in the variables file.
tinsert( sessionInfo, { currentDate, sessionCount } )
or
tinsert( sessionInfo, { ["Current Date"] = currentDate, ["Session Count"] = sessionCount } )

This would make the table look as follows:

sessionInfo = {
     currentDate,       --1
     sessionCount,     --2
}   --1

or

sessionInfo = {
     ["Current Date "] = currentDate,       --1
     ["Session Count"] = sessionCount,     --2
}   --1

Dependant on which way you do it.