My husband went to a lot of the appointments for our two, especially for our first, and fewer for our S.. I think he was nervous and wanted to see what this was all about! I loved having him there. It was a great bonding experience for both of us. Him talking to my doctor at the appointments and being able to ask his own questions really put him at ease, even though he never said so, and we learned a lot together. Now, if you are just peeing in a cup and in and out, then no need for a partner that day!
But seriously, in his mind he is probably thinking he is there being supportive, and that is also doing well to take care of the 8-year old. So if you say anything, which I think you can, just be sure to be nice and don't insinuate that he isn't involved!
And I do not think it is weird for him to be with you at the appointments, to answer your final question. But I also don't think it is weird if he doesn't go to each one. Most women I see in the waiting rooms are there alone, unless it is a sono. I know you didn't want us to say this part, but it is truly what you want to happen! If you want him there, tell him! To me, if he took off work to be there, sitting in the waiting room would be pointless. Maybe you can both agree he comes to the big ones, that way childcare for the 8-year old is less of an issue too. Whatever you do, just talk about it and agree! Good luck!