Answer: I think you did just fine in planting your miniature roses. Most will have several stems and it is not necessary to try to separate the stems when replanting. If you have two roses together, they may be separate plants or they may both be grafted onto a single root stock. You won't know unless you rinse all the potting soil off and examine the roots, as well as where the stems are attached to the roots. At this point I don't think that's necessary. Just enjoy your roses and when they begin to outgrow the pot you can transplant them to a larger pot. At that time you can inspect the roots to see if you have one plant or two plants. If you have two you can separate them easily by setting the roots in a bucket of water and swishing them around. The water will help untangle the roots and you should be able to see where to separate the two plants without harming either one.
Best wishes with your roses!
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