I added a stitch, can I just knit two together?

I wish I could answer your question because you made an effort to answer mine. But I edited my answer. Do you have any ideas on what I should do it on?

once you turn the knitting to start up a clean row verify that in case you're actually not slipping the 1st stitch which you convey the yarn below the needle to the returned to knit. Any time the yarn is going over the needle you finally finally end up with a yarn over, or an advance stitch. In convey the yarn up once you turn you are able to pull the final stitch labored up so as that apparently which you have 2 stitches to paintings, whilst it is quite one stitch interior the row below. As has been indicated once you purl you need to convey your yarn to the front and then to the returned, yet you're able to desire to try this between the needle information, no longer over the outstanding hand needles or returned you advance. As for removing the 9 stitches and not utilising a hollow, quite, sure, the suitable factor is to tear it returned to the place you have the outstanding sort of stitches and initiate up returned from there. there are worry-free techniques to shrink, yet you're unlikely to finally finally end up with something that looks the way you predicted it to.

Knitting 2 together will upset the pattern but if you didn't notice where the extra stitch upset the pattern then you won't notice the K2tog either.