I wouldn't let that worry you. Often the latest DAT is published way before it gets to the servers for every area. However it says you have 7002 which is the latest one so it must be querying the engine. As you get your software from Dell that may be slightly older than the current one, but that's just a guess.
If SecurityCenter is showing green and protecting then I wouldn't worry about it at all.
Thank you for all your patience.
You're welcome ;-)