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Yea trying to clean up some of my campaigns, right after AdwordsAdvisor posted I just deleted some ads and several kwords, built new ones and every single word immediately went on hold.
Jazzy, I do understand that this is frustrating, but it's not really a mystery. Here's whats happeing: it most likely means that, account-wide, you've reached your limit of in-trial keywords - and none of the keywords that you've just entered have a historical CTR sufficient to have them run as 'normal'. So they go on-hold.
I can't see your account, of course, but a possible fix would be to try using similar, but more targeted keywords. You might also want to contact AdWords support to see if they can offer you some specific suggestions, based on a look at the account itself.
Below is a bunch of info from the AdWords FAQ, that I hope will help you to understand what is happening.
This link leads you to a diagram which will explain how a keyword can be put on-hold immediately:
keyword evaluation flow
This one is also useful in understanding how it works:
Three keyword evaluation Examples
More related info from the FAQ:
What is the AdWords keyword status column?
When does a keyword enter in trial status?
Hope this'll help.