So my yeast starter went well but when brewing I only added about half of the extract at the beginning of the boil. I was set to add the last bit at then end and forgot until after I had cooled my wort. So what I did was boil a gallon of my top off water and add it to that. I got that down to temperature but couldn't use my chiller on it as it was in a smaller pot. So I stuck a lid on it and put it in the freezer. It took about an hour to get down to temperature. I then added the two bits of wort, topped off and had a little more than 5 gallons. I put the starter (that I decanted) in and within a few hours I had a bubbling airlock. This morning it was going crazy and the foam was to the top so i added a blowoff. So my concern isn't the fermentation at this point rather, any off flavors due to the wort being two seperate "batches" if you will and the fact that the main batch sat out for a while after I had cooled it. What are my chances that this batch may still be ok?