If the fermenting was done, there nothing to worry about. This is one advantage using a secondary, it really cut down the chance of having bottle bombs.
I do 1 week in primary and1 week in secondary to for most beers, but some beers will need a little longer in the primary. I age my beer for at least 8 weeks and some are near a year. I do have beer 1 1/2 years old and taste great. I will be putting down a wheat beer with raspberries all in...
I have three fermenters with spigot in them and never had any problems. I used them for the primary vessel. I get no trub and I use a hose to go into the secondary.
I use twist off bottles and no problems. You should have a bench capper. Don't twist off the caps , you should you an opener. The bottles will last longer. I have twist off bottles about 20 years old and still good.
no-boil kits can produce some really good beer. Most kits are prehopped but there is thing that can be added to beer. Infection is not a big problem with the kits as long as you have everything sterlized. The kits are a lot faster to make. The info they give with these kits and how to make...
I use all twist off bottles and no problems yet. I have some beer a year old in twist off. You should have a good bench capper to get a good seal, without breaking the bottle.
You should put your light bulb down at the bottom of the freezer and the thermostst near the top of the freezer. This way you will get more evenly heat in the freezer. Heat will rise. If you plan to go this way.
I use a light bulb to keep my unit at a steady temperature, for years. I use a electric thermostat to control the light bulb and temperature. It works great. My light is shaded from the beer. My unit is not a 100% air tight.