I considered reporting this as a bug but I wanted to do a little more research first. After quoting a post, when I start to type a reply below it, the cursor will occasionally jump up into the quote tags and my input will go in there. It's quite puzzling and I have not been able to find any rhyme or reason to it. I first noticed it on my site but it just happened to me on here. This only happens on my Galaxy S3 (never noticed the problem on my iPhone). I also use Google Keyboard, haven't tested it with the stock keyboard yet. Curious to see if someone else has noticed this or if it's just my phone.