I keep getting a captive Wi-Fi message instead of my homepage..WHY..?

The captive.apple.com error would normally suggest that you are trying to access the internet from a public WiFi hotspot; the URL is used by the iPad to detect internet connectivity. Errors relating to the address generally indicate a failure to authenticate the user via the hotspot operator’s paywall/terms page - prior to granting internet connectivity. As you are using a domestic Broadband service, the only other viable explanation is that your WiFi/Internet router is perhaps blocking access to some internet resources.

Perhaps this support page will be helpful with troubleshooting:

Use captive Wi-Fi networks on your iPhone, iPad or iPod touch – Apple Support

Apple reportedly uses this URL to test for a Captive Network:

https://www.apple.com/library/test/success.html

Are you selectively blocking any sites or protocols via your Router’s firewall? You’ll need to check the setup of your WiFi Router. Pay particular attention to any firewall logs - as these may provide useful clues.