The Scene SAVE had a communication problem with one of the OutletLincs and stopped the Scene creation process. From the Scene display results it looks like communication with the OutletLinc OFF SPOT was successful. For the RemoteLinc to control all three OutletLincs even though the EZSrve Scene creation was not totally completed, Responder link records must still exist in the OutletLincs from when you established links manually. When button 1 ON is pressed the RemoteLinc sends out a Group Broadcast ON message for Group 1. This message is not addressed to any specific device. All devices that have a responder link record with the RemoteLinc address will respond to the Group Broadcast ON message. This is a normal Insteon hardware response. You will find this written up in the Quick Start guide or the User Guides of the various Insteon devices under the section on Factory reset. When you deleted the Scene, EZSrve deleted the responder link from OFF SPOT because that was the only responder device it was aware of in the Scene. That is why that device no longer responds to a button 1 press. The other two OutletLincs did not have their responder link records deleted by EZSrve because they were not part of the Scene definition when the Scene was deleted.
Do you Smarthome Access Points installed for cross phase communication. The communication problem with OFF WIN OutletLinc could have been a transient problem, other Insteon traffic on the powerline during the scene creation process, or perhaps a persistent communication problem that will have to be resolved. There are devices which can induce noise on the powerline and devices which can attenuate the Insteon powerline signals. PC power supplies, UPS power supplies, some battery chargers can be either. Smarthome makes a FilterLinc device which can resolve both noise and signal attenuation problems. Plugging EZSrve into a surge suppressor will also degrade the powerline signals sent and received.
A RemoteLinc is one of the hardest devices to link with because of the receiver timeout to save battery life. Of course we are past that point now but there is a SYNCH EZSERVE function under EZSrve Device Management that reads the link records in a device and records them in the devices3.xml file. It is a good idea when the RemoteLinc times out, to use a different button than the one you are creating links with a Home Automation device or software. Once the first link is established with button 1. each time you press button 1 could cause it to send a Group Broadcast if the timing of the button 1 press is not correct. Of course when linking using the manual process you must use the RemoteLinc button you want to link with.
I would suggest downloading from the Simplehomenet web site their Simplehomenet Utility Suite. It is a free program that connects to the powerline through EZSrve. It can be used to display the link records in the OutletLincs. It can also be used to remove the responder links that were originally created during the manual linking process.