I always make sure I use the same phone number, and only that number for all my ADR's. And I check a few times then once I get there at my WDW resort get them to print out my ADR's. I can't tell you how many times I have found errors.
And very weird thing on this same note. I called to check on all of ours the other day. Several that I had cancelled were still active so I took care of that. Then there was a reservation made under my husband's name with our phone number for Trails End she said. I never made that. No idea how that one came up. It was for a day before we even arrived. I cancelled it but then later on thought I should have left it. That is some guy's ADR and he is going to show up and find it cancelled.