Hello Mdz,
Actions in the UDP action list can have one of two trigger types: Message and Receiving.
The trigger type Message is used to respond to specific incoming messages. The message used by the action can be set in the trigger value.
The trigger type Receiving will respond to all UDP messages which are received. You may have seen the status bar in the bottom of the web interface which will highlight UDP when the CueCore1 has received a UDP message. The trigger type Receiving works in the same way.
I expect that you may be using the trigger type Receiving instead of Message in all actions. Which would cause all actions to activate on every received message. Including "random" packets.
You also have stated that only the last action is actually executed while multiple are highlighted in red. Which I have not seen happen before. To help you with this problem I would need a backup of you CueCore1. Please create a backup of your CueCore1 using the vManager and send the backup to me.
Best regards,
Guido