These new multivitamins have about half the amount as my previous ones but still say 2 a day. shouldnt the dosage be doubled? im really confused

Doses vary so...: There are many different ideas about how much vitamins one should take. Some multivitamins just provide the RDA, for example 3 mg of B6. This is fine for some but many benefit from higher amounts, so another multi might have 50 mg of B6. It is usually safe to take higher amounts; toxicity can occur from too much B6, A or D but one generally has to take massive amounts to get toxic. See comment:

Vitamins: A good multivitamin is a good idea. It's like an insurance policy for when we don't eat right, don't sleep well, or are especially stressed. Go to a good store or get some guidance because the popular brands are typically very week and not helpful. The dose (read label and check that half or more of the ingredients are several 100 per cent above RDA. Dose more important than a long list.