Pathfinder 2e Eidolon

[Thorns001]

Hi all,
I am trying to build a Summoner in HL and the Eidolon which is automatically attributed to the character appears somewhat overpowered. I set the size to Medium but it comes up as Huge (with the reach associated with a huge creature). HL also appears to show all the types of abilities that an Eidolon can have and does not limit them to the type of Eidolon you have selected. Additionally it has spell casting slots (maxed to 7th level) and as far as I am aware, my Eidolon cannot cast spells (especially at that level when it is only a first level creature). Am I missing something in setting up my Eidolon in HL or is it just created like that as a default? I know Eidolons can be just about anything but HL is usually smart enough to auto-calculate things. Any assistance would be appreciated. Thanks.