AH!
So you have the opposite oven problem......you are breaking one in!!! LOL
And convection as well?
Hmmmmm. I think yes, maybe until it's been used for about a year or so, you might need to turn down the heat.
Getting a thermometer might help you with a new oven. Once in a while things don't get put together the way they are supposed too, so maybe it is baking/cooking at a higher temperature than it says it is. If this is the case, then it should still be under warranty.
If there is nothing wrong with the appliance, then it probably just needs breaking in time.
As for checking pound cake..........I've always done it the old fashioned way..........when the top cracks open, its done. Although, "doneness" for a pound cake is dependent on your preference to how "done" it is. Some people like very well done pound cake, some like it a bit like brownies...sort of soft and a tiny bit on the "gooey" side, while others will eat it any way they can get it (me)! LOL
Another old fashioned method I use on cakes of all kinds, is the wooden toothpick. I get a big box of wooden toothpicks from the dollar store and keep a container of them.
When the cake is near it's done time, stick a toothpick in the center of the cake, as far as you can without losing it in there. Pull it out. If it's dry, the cake is done, and more than likely will be a bit dry once it cools off. If the toothpick has some bits stuck to it, then pull out the cake...by the time it cools off, it should be just right. If you like your cake more moist, then when cakey bits are stuck to the toothpick, but not gooey batter, then pull out the cake and let it cool. And of course, if there is batter stuck to the toothpick, then I usually turn the oven off and leave the cake in there a few more minutes. I turn it off, in case I forget the time.....and I don't end up with burnt cake, but maybe dry cake. I can fix dry cake, but not burnt cake.
Hope that helps.