I have been collecting points using my Delta number when taking flights on Continental.

I only fly once a month and it is about 10,000 miles.

The problem I am having is that Delta gives me half of the miles that Continental would, and my Elite status is not recognized by Continental and therefore no upgrades.

Should I start using a Continental number (0 miles) for my flights so that I can get into their elite status and get all my miles or just stick with the Delta number and get half the miles and no elite upgrades since Continental won't recognize Delta's status?

Any suggestions are appreciated. Unfortunately I don't have any say on my flights and it seems that Continental has been cheaper for the last few times and thats who I have to fly with.

Thanks.