OCN Interacitve on "[Plugin: Seamless Donations] Version 4.0.16 is up - with full https support for PayPal compliance"

Hello - I have installed version 4.0.17 -
I have followed what I believe to be all the instructions to set up correctly. Everything is currently in test and sandbox mode -
The paypal sandbox is functioning correctly and capturing all info.

Site is hosted at siteground.

The website/plugin is sending fine - cURL: 7.49.1, SSL: OpenSSL/1.0.2h, HTTPS: responds is working

Thankyou email is fine -
But no Donations or Donors are posting at all.

The log >>
[Seamless Donations Log Data]

2016-07-21 20:12:39 DONATION TRANSACTION STARTED
2016-07-21 20:12:39 Processing mode: SANDBOX
2016-07-21 20:12:39 PHP Version: 5.6.23
2016-07-21 20:12:39 Seamless Donations Version: 4.0.17
2016-07-21 20:12:39 User browser: Chrome 51.0.2704.103
2016-07-21 20:12:39 IPN (http): http://gorgecf.org/wp-content/plugins/seamless-donations/dgx-donate-paypalstd-ipn.php
2016-07-21 20:12:39 IPN (https): https://gorgecf.org/wp-content/plugins/seamless-donations/pay/paypalstd/ipn.php
2016-07-21 20:12:39 Payment process nonce daeec9818c validated.
2016-07-21 20:12:39 Session ID retrieved from _POST: SDS01-62C3BA54-26EE-C946-57BC-DB9CD21D8A37
2016-07-21 20:12:39 Looking for pre-existing session data (guid/audit db mode): SDS01-62C3BA54-26EE-C946-57BC-DB9CD21D8A37
2016-07-21 20:12:39 Duplicate session data not found. Payment process data assembly can proceed.
2016-07-21 20:12:39 Success URL: http://gorgecf.org/donations/?thanks=true
2016-07-21 20:12:39 Saving transaction data using guid/audit db mode
2016-07-21 20:12:39 Name: ***sis*****
2016-07-21 20:12:39 Amount: 3
2016-07-21 20:12:39 Preparation complete. Entering PHP post code.
2016-07-21 20:12:39 Checking for repeat. REPEAT value is [].
2016-07-21 20:12:39 Computed RETURN value: 'http://gorgecf.org/donations/?thanks=true'
2016-07-21 20:12:39 Redirecting to PayPal... now!
2016-07-21 20:18:53 dgx-donate-paypalstd-ipn.php called outside of constructor.
2016-07-21 20:18:53 ----------------------------------------
2016-07-21 20:18:53 PROCESSING PAYPAL IPN TRANSACTION
2016-07-21 20:18:53 Seamless Donations Version: 4.0.17
2016-07-21 20:18:53 IPN chatback attempt via TLS...
2016-07-21 20:18:53 IPN chatback attempt via SSL...
2016-07-21 20:18:53 IPN chatback attempt completed. Checking response...
2016-07-21 20:18:53 IPN failed (unrecognized response) for sessionID SDS01-62C3BA54-26EE-C946-57BC-DB9CD21D8A37
2016-07-21 20:18:53 ==>

2016-07-21 20:18:53 IPN processing complete.

Should I work with SiteGround?

I did notice when testing with IE it said only some of the data was secure - I have a lot of options in the drop down box.

Sitepage for testing http://gorgecf.org/donations/