Pelargonium citronellum should have a distinctly citrus-y fragrance. The sense of scent is very subjective, so it may just be your nose rather than an issue with mislabeling :-)) But it could just as likely be a rose geranium as well.......Pelargonium graveolens looks quite similar both in leaf and flower to citronella and has a range of scents, including a lemony one. I'm no expert but I think they could be rather easily confused.

Both can be used for culinary flavoring.

Here is a link that might be useful: Pelargonium citronellum

Thank you gardengal for your response! Now I am late in replying but I do appreciate it :) I definately believe that it is all in what im feeling when i smell it, it certainly does have a lemony scent, then it seems to have a lingering rose scent so its probably just my nose. I cant believe the similarities in the two plants! I have just been browsing online and they seem almost interchangable. again thanks for your reply!

Here is a link that might be useful: a photo i found, they look so similar :)