Fisher Price Take Along Swing?

ctnj

My sister had the aquarium take along swing rather than a big, bulky one (discontinued, damnit) so we registered for the Precious Planet Khaki Sands Swing- put it together and it seems a little wobbly.  The swing function runs fine, but in general wobbly.  Anyone have this swing??

I'll also ask her if hers is wobbly w/o child in it- I guess we can just get hers if it comes down to it.  Thanks!