NO. Why would you even think this?
Do schools look down on kids who work in 2 different research labs....
We'd consider that you're getting a greater exposure to research and learning more. Do something about the anxiety, will ya? I know that this is an anxiety-provoking process, but, jeeze, 'cmon...there's no need for paranoia.
If they do notice do they consider it a lack of loyalty or acting shady?