[Aza]

no its not u its like that also with me nice work on the start about your Q
there a couple way`s to do it
1:go to edit poly choose those vertext and press the icon next to weld increas the weld range
2:go to edit mesh and go to the mesh menu left of u change the number of vertext to weld of 4 to 2 and choose the vertext and press weld


3:this way is probley the most easiest u complete 1 side of the car copy it and put it next to the other part then u selecte both parts(hold controle and click on both parts)and go to the modfifier menu and choose symmestry this weld both part automatichly u just need to change the range of it dont make it to high or else it welds stuff u dont want and if u have some gaps over u just try methot 1 or 2 for those gaps left

i hope i help u if not just ask
good luck m8